#gemmologist

[myblacknightworld]

every female character in recent history (not animated) tries to be Marguerite Krux (multidimentional, allowed to be a real person with real feelings and reactions and, most importantly, flawed, imperfect, and allowed to make mistakes and learn) so hard and yet they miss the target by half the distance between here and the sun, when everyone in studios should just understand that perfect doesn't mean better, quite the contrary

[just-here-with-my-thoughts]

Yay for spodumene! Spodumene varieties are lesser known in the gem trade than many of the more famous gem species (I admit I'd never seen it before studying my diploma) and kunzite and hiddenite are probably the most desirable.

(@theproblemwithstardust I know you probably know more about this than me but here's the breakdown for anyone who is interested...) Oh but also below a keep-reading because I also rambled ^^;

pure spodumene without any impurities is clear Many gemstones would be colourless if they were completely chemically pure. Their colour comes from trace amounts of other chemical elements which are not intrinsic to the chemical crystal structure of the mineral itself - these are called allochromatic or 'other-coloured' gems!

For example, pure corundum (aluminium oxide) is colourless (we'd call it white sapphire! If it contains traces of iron and titanium this colours it blue, and we call it sapphire. If it has impurities of chromium it is coloured red, and we call it ruby!

Gemstones where the colour is caused by an element intrinsic to the crystal structure are called idiochromatic or 'self-coloured'. Examples include peridot (magnesium iron silicate) and pyrope-almandine garnet (iron aluminium silicate)

pink/purple gem varieties [of spodumene] are called kunzite and the color is caused by trace amounts of Mn Manganese as a colouring element in gemstones often produces a pink to orange colour palette depending on the surrounding crystal environment. It causes the pink of spodumene var. kunzite and beryl var. morganite as an impurity (allochromatic gems), and the orange of spessartine garnet and pink of rhodonite and rhodochrosite as an intrinsic chemical element (idiochromatic gems)

the color is very prone to fading in uv light A great tip for any pink or light purple stones is to keep them away from strong light! Their colour can fade from prolonged exposure to ultraviolet radiation, and you wouldn't want to spoil your beautiful gem collection - so tidy your jewellery away nicely and maybe stop keeping your rose quartz crystals on the windowsill in full sun :')

Fun fact I did my own experiment with zircon based on a paper I'd read about reversing the colour degredation caused by UV exposure. I was so excited I forgot to take before and after photos! The great news is (in zircon at least) you can reverse the colour change by exposing the stone to incandescent light (which is typically accompanied by infra-red radiation - ie/ the kind of light bulb that emits heat!) But I'm getting distracted from spodumene...

The dark green variety is hiddenite, NOT kunzite like it is labeled here and the color is due to trace amounts of Cr and possibly V My memory hack for learning this gem variety was that hiddensite is like Hiddleston like Tom Hiddleston who wore green as Loki in the Marvel films :P So yes the chromium-coloured green variety of spodumene is called hiddenite!

Many lesser known gem colour varieties get referred to as 'colour famous-cousin' for ease of explanation - it's not gemmologically correct but it often happens particularly when it comes to trying to sell these things! Lots of people wouldn't know prasiolite, but they can imagine what you mean when you say 'green amethyst'.

That said, there are times it is correct to do this! Sapphire occurs in every colour except red (because if it's red, we call it ruby), but any other colour is referred to as 'colour sapphire'. So it is correct to say pink sapphire, yellow sapphire, purple sapphire! If you just say 'sapphire' we assume you mean blue :)

the pale green/yellow gem variety of spodumene [is] called triphane Oh exciting! I didn't know this! ^_^

Not spod related but we also learned in mineralogy that bixbite is an outdated term since it’s so close to bixbyite. we just call it ‘red beryl’ but I’m not sure what it is like in the gem world!) The proper way to refer to it would be beryl var. red beryl, but if you said bixbite we'd still know what you meant! :) This is also a gem which would be misnomered as 'red emerald'...

Naturally occuring red beryl is very rare, and typically occurs in small sizes not suitable for faceting as gemstones. That said, these things can be created synthetically and synthetic hydrothemal red beryl is another stone which shows FAB orange/pink pleochroism!

ps. I think a lot of the pictures in the original post are colour enhanced, it's a fun guide but maybe go speak to your friendly neighbourhood gemmologist if you want to know if they're actually representing the colour correctly!

By LabradoriteKing on Pinterest

[electricboogaloosstuff]

FIRST DAY OF MY LIFE AS SOMEONE WHO FINISHED HER HIGHER STUDY AND DO NOT HAVE TO GET JOB YET LIFE IS GOOD NO STRESS IN MY BODY YIPPEE

[ratnawala]

Expert Gemmologist in Bhopal | Ratnawala

At Ratnawala, every gemstone is meticulously tested and certified by our expert gemmologists in Bhopal, ensuring you get the best results for your investment. Whether it is for astrological purposes or a precious jewellery piece, trust us for authenticity and quality.

[dykeravengard]

genuine question this has been bugging me for ages. if diamonds are the hardest material there is. how cut diamond

incredibly good question, the answer is very simple: other diamond

...yeah i'll elaborate. i'm not gonna get into crystallography because i would be here for 10 hours, but the most condensed explanation i can give you is this: crystals dont have the same hardness on every face, if you hit a crystal on one side you're more likely to scratch it than if you hit it on another side, and so on

the entire diamond crystal doesn't have a uniform hardness, i mean the entirety of it is very hard, but some parts of the same diamond crystal are harder than others, and the less hard ones can be cut by the more hard ones. i'm not a gemmologist so i don't actually know how the entire process works in detail, but yeah in short we use diamonds to cut diamonds

also fun fact diamonds aren't actually the material with the strongest bonds, but it's a close second to graphene... i would need an essay to explain this so come back with a warrant for it

[just-here-with-my-thoughts]

Haha you are very kind and I think it's insanely interesting too, so I'm glad you enjoyed reading!

Apologies if it launched into the science half-explained, I was trying to remember what basic concepts you needed to understand pleochroism. As Tech would say, "I thought it was obvious" - like, because I know what I'm looking at, of course I knew it was one crystal - then you said that was mind-blowing and I was like 'wow yeah I guess it is!' :D The pictures are actually screenshots from a video which wouldn't upload but it's even more amazing to watch the colour shift before your eyes as I turn the crystal...

There is so much fascinating stuff about the colour of gemstones and their properties - pleochroism is probably my favourite but we haven't even started on the Colour Change Effect, internal reflection effects caused by inclusions, absorption spectra and how we perceive colour, gemstones which fluoresce or even phosphoresce under UV light... there's so much to love!

But! Thank you so much for inviting me to talk about my specialist subject, I really hope you enjoyed it - I'll follow up with more photos of pleochroic stones when I have the chance! :)

(More Tech-era gemstone infodumping Here if you're interested)

ps. @theproblemwithstardust I'd love to see your kunzite! I don't have one in my collection... shall have to add it to the wishlist :)

Pleochroism in gem quality zoisite var. tanzanite

Apparently we're doing this...

*my photos, not my crystal

Ever wondered why the colour of some gemstones seems to shift as you view them from different angles? Perhaps are you were looking at a pleochroic gemstone!

Pleochroism is a body colour effect seen in transparent to translucent, optically anisotropic* crystalline material caused by differential absorption of the polarised light rays following different paths through the gemstone, and causing a change to perceived body colour when the stone is viewed from different directions.

...Okay, but what does that mean?

Pleochroism means 'many coloured'. When light passes through a crystal, it is sometimes split into two rays - each ray takes a slightly different path, and because it encounters different atoms within the crystal structure, it is modified to a different colour.

When both different coloured rays of light exit the crystal, your eye resolves them as a single colour. Clever, right? :D

The four photos above are of the same crystal. The top photos show the crystal from two different angles - one looks distinctly more purplish than the other, right? That is eye-visible pleochroism!

Even gems that show pleochroism don't always show it strongly enough to see with the naked eye. But this tanzanite crystal does.

The bottom photos show the same crystals viewed through a type of polarising filter called a dichroscope. The dichroscope is made of polarising film where each half lets through only one of the rays of coloured light - meaning you can see each of the two colours at the same time, one in each half of the filter!

But wait!- I hear you cry. Why are there THREE different colours??

Hmm well this is getting into a deeper discussion of crystal habits and their optical behaviours, so for now let's say that depending on the symmetry of the crystal, an optically anisotropic* stone can show two or three colours - but only ever two in one direction! You have to turn the crystal to see the third colour.

If a stone shows two colours we say it is dichroic, if it shows three it is trichroic. This is the maximum number of colours you will see.

When you view the tanzanite crystal in the position in the left photo, the light rays being transmitted are blue and reddish-purple. Your eyes resolve this to show a purpley-blue colour. Neat!

But in the position from the right photo, it's transmitting blue and yellow. Wild! The yellow ray dilutes some of the intensity of the blue, so the colour you see is a weaker blue tone.

The photo I'm missing from my set is the crystal viewed from top-down, which would then show a purple and yellow split through the dichroscope!

So turning the stone, or moving your head position relative to the position of the stone, really does change its colour, because you are perceiving a different set of coloured light rays being transmitted through the stone!

When fashioning a rough crystal, a lapidary (that's a stone cutter) would to orient the crystal so the best colour is face-up - ie. when you look at the finished polished stone, you will see the most attractive balance of colour. What is considered ideal varies with the stone - you might cut a very dark crystal to show its lighter colour, or a pale one to show the most intense colour it is able to!

Fun additional fact - tanzanite can be heated to improve its colour. It does this by removing the yellow element entirely, meaning you will see intense bluey-purple tones from all angles! The wonders of stone treatments!

*Edit I am misleading you by saying you will see bluey-purple in all directions... in two directions (as tanzanite is a biaxial gemstone) you will find an optic axis, which is a direction of optical isotropy in an otherwise optically anisotropic* gemstone. So in this direction, you will only have a single transmitted ray of light, not two!

*I use the phrase optically anisotropic a couple of times and it's hard to explain without a whole separate citizen lecture on crystallography, but the quick summary is that it means a crystal in which light behaves differently as it travels in different directions - such as the differential absorption resulting in different colours in pleochroism! This is as opposed to an optically isotropic crystal, where light behaves the same way in all directions of travel.

And that is a recited-from-memory summary of pleochroism! :D (please don't tell me off if I got any of it wrong I didn't go upstairs to check my notes ;_;) (I mean I didn't get any of it wrong but my quoted definition probably wasn't word perfect ^^;)

@royallykt thank you so much for your interest i hope you enjoyed learning about all this :)

[haretobeloved]

Also Mole's romance plight is another reason I see him as autistic, a lot of autistic people could be described as hopeless romantics/obsessed with love or the concept of soulmates because the fantasy that someone understands us so perfectly is so foreign/unnobtainable (at least in our minds) that all we can do is daydream about it and project it onto media/etc

So I think, maybe, Mole tells himself he's come to terms with it and really throws himself into his work, but when he's digging alone with no one else around and the cavern walls are no match for that feeling of dread - he probably cries/gets caught up in the idea all over again

Then he meets Crow, and is genuinely thrown off that a) they have such similar passions for their work and b) that Crow seems to smile at him in a way no one else ever had before. Genuine + warm, no underlying disgust or malice, just... a real smile. He (Crow) is even charmed by him!

Team Atlantis watching the gemmologist they needed an opinion from flirt with Mole: Oh my god, we need to make this happen because this is a once in a lifetime opportunity

^ The crew probably encourages Mole to talk to Crow more, maybe even gets Crow hired for the expedition instead of being just the opinions guy just so they can see each other more (obviously they don't say it directly, more like a "hey, we might find more of these weird crystal growths and you guys seem to make a good team with this stuff, how about you come along?" Crow would brim with excitement, running around and giggling as he grabs his stuff. Mole seems off put to have another dirt/rock person on the crew for a moment until he looks back and has his moment of "knowing" with the laughing and the rambling.)

Sorry this turned into a gay ass ramble, but I love Diamonds in the Rough sm, Crowley and Gaetan when I fucking get you-

[steliosagapitos]

         ~ “Elizabeth Taylor's jewelry was an infinitely beautiful token of the love, quite difficult, that she shared with Richard Burton. You can literally say that she was inundated with jewelry, her amazing collection will be the subject of the following posts. First up is a brooch with a magnificent Burmese sapphire, which was created in the late 19th century. The brooch features a cushion-shaped sapphire weighing 37.29 carats, which has been recognized by leading gemmologists as an uncorrected specimen, so its spectacular color is completely natural. The entire piece is beautifully set in gold, complementing the setting with diamonds in the old European cut weighing about 15 carats. From the memoirs of Elizabet Taylor herself, it can be inferred that this was her favorite brooch. After Elizabeth Taylor's death, the brooch was auctioned along with her jewels at Christie's in 2011 as part of The Collection of Elizabeth Taylor: The Legendary Jewels.It has now gone up for auction again this time through auction house Sotheby's, with a staggering valuation of HKD 12-20,000,000.“ ~

[hazoorilaljewellers]

Hazoorilal Jewellers by Sandeep Narang is one of the top luxury jewellery brands in India. They have a team of gemmologists who can help you choose the right jewellery piece at the best price.

Read More: https://www.hazoorilaljewellers.com/

Hazoorilal Jeweller Greater Kailash Part I,M-44, M-Block Market, New Delhi– 110048 +911141734567

[buymydiamond]

Guide to Sell Your Precious Gemstones for Cash with Confidence

The first, after you have made the decision to Sell Your Gemstones for Cash, is to determine their actual value. Understand what you own; that is going to protect you from accepting a lower price than they are worth. You can consider getting an appraisal by a certified gemmologist or an honest jewellery expert.

[fashiondaily1221]

Best jewellery shop in Lajpat Nagar with unique designs

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Why settle for less when you can have the best? That too at a very reasonable price. We always excel and deliver more than what you will expect from us, this gives us a sense of pride and heartfelt satisfaction seeing our customers smile with enjoyment and amazement when they find the perfect jewellery that suits them perfectly. We are a dedicated team which is always striving to improve regardless of age and gender. We always treat our customers the best and strive to move forward to achieve perfection in our work and craft.

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We are experienced and skilled gold and diamond dealers. We also offer services of jewellery valuation and jewellery repair to our valuable clients and customers. You can count on us for accurate jewellery appraisal. We also offer gemstone jewellery and diamond engagement rings. We as a team of goldsmiths, gemmologists and jewellery designers strive to hone our craft to serve you the best jewellery you can find. Government approved jewellery valuation.

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[electricboogaloosstuff]

Alright buckle up, I'm going on a rant

So I was on Instagram and an add pop up. It's several rings. I see one that I find pretty so I look up the model just so I know what kind of price we're talking.

And my god do they have no shame ?

Alright so background information, I'm a geologist and a gemmologist so I know my rocks. The ring I found was this one :

Natural back opal is one of the most expensive type of opal out there. Here, we have lab grown opal, you can tell by the stripped pattern. Uncut it looks like this :

Now, no hate toward lab grown gems, the fact that we can imitate natural gems is pretty cool if you ask me.

BUT

Lab grown opal is obviously WAY cheaper than natural opal. Especially for black opal.

600$ looked pretty high for me so I looked up other rings in this style

BAM WE LOOSE MORE THAN 450$ (still too expensive if you ask me but still).

THAT'S NOT ALL

If you were to buy the raw material (keep in mind that it's an estimate because I couldn't find prices directly from the lab)

One slab big enough to do several rings is the price of one of the cheaper ring (keep in mind that you still have to make a ring out of it and you have to pay for that).

So let's be clear, do not buy a 600$ lab grown opal ring, it's not supposed to be that expensive.

Anyway always check where the gems in your jewelry is from folks <3

[chrisnotti]

Ensuring Authenticity: The Ultimate Checklist for Antique Gold Ruby Pendants

Ask yourself: How would you feel if you were ever gifted an antique gold ruby pendant? Great, isn’t it? That’s the charm of this timeless piece. Antique pendants made out of ruby and gold carry a rich history and elegance with them.

But possessing such a sophisticated and luxurious item makes you check its authenticity.

Here's the ultimate checklist to help you verify the authenticity of antique gold ruby pendants.

VERIFY PROVENANCE

Verifying the provenance is the first step in checking the jewelry's authenticity. Provenance here refers to the documents of the past ownership and authenticity certificates. Genuine antique products have a thorough documentation of their past. From whomever you purchase it, ask for records and proofs to thoroughly check the jewelry’s authenticity.

CHECK FOR HALLMARKS

You must be aware of what a hallmark is. It is a mark that shows the purity of the gold by tiny stamps. These markings reveal important details related to the authenticity, documentation, and age of the product. Look for the assay office mark and the karat mark under a magnifying glass to stay guaranteed and learn what they mean.

EXAMINE THE CRAFTSMANSHIP

Antique jewelry displays superior craftsmanship with intricate detailing. The handcrafted designs such as the engraving, the placement of the precious gemstones, and its overall designs speak a lot about its makers and time. Such elaborate designs are challenging to copy

ASSESS THE RUBIES

Real rubies are not perfect like fake stones. They have natural imperfections and color variations. Even after observing the natural structures, if you are unable to differentiate between real and artificial rubies, consult a gemologist to evaluate them. They will also tell you if there are any treatments applied to the imitation stones so that you can be careful in the future.

CONSULT AN EXPERT

Gemmologists or antique jewelry dealers can offer authenticity services and insightful advice. They have a deep understanding and the required equipment to determine the genuineness with accuracy.

CONSIDER THE PRICE

Before purchasing such antique pieces, search their market prices and have an estimate of that. If you observe any items priced at lower costs, be aware, as they can be fake replicas.

By following these points you can ensure that your antique gold ruby pendant is genuine. Authentic antique jewelry of precious materials and gemstones holds monetary value and historical significance.

If you want to make a valuable investment, visit https://www.crisnottijewels.com/ to find an exclusive collection of antique, vintage, and fine estate jewelry. Shop now to grab every collector’s dream.

[palak-shah-21]

A Legacy of Excellence: The Story of Asian Star, a Leading Certified Diamond Dealer

In the world of diamonds, where brilliance meets meticulous craftsmanship, Asian Star stands out as a beacon of trust and quality. For over five decades, this Certified Diamond Dealer has carved a niche for itself, etching a remarkable story of excellence that resonates across the globe.

This article delves into the captivating journey of Asian Star, exploring its rise to prominence as a leading name in the diamond industry. We'll uncover the values that define their success, their unwavering commitment to ethical sourcing, and the unwavering dedication that has cemented their position as a Certified Diamond Dealer of unparalleled repute.

From Humble Beginnings to a Glittering Legacy

The Asian Star narrative commences in the bustling heart of Mumbai, India. It's a story woven by the Shah family, whose entrepreneurial spirit and unwavering dedication laid the foundation for the company's enduring success. Across three generations, Asian Star has transformed from a modest venture into a global diamond powerhouse, supplying some of the world's most prestigious jewellers and retailers.

The company's core philosophy remains rooted in integrity and a commitment to the highest ethical standards. Asian Star is a proud member of the Responsible Jewellery Council (RJC), a testament to their dedication to social and environmental responsibility throughout the diamond supply chain.

The Pillars of Excellence: Quality, Expertise, and Innovation

Asian Star's unwavering commitment to quality is the cornerstone of its success. The company meticulously sources rough diamonds, ensuring each stone adheres to the strictest quality parameters. Their team of highly skilled gemmologists meticulously evaluates each diamond, employing advanced technology and a keen eye to assess the coveted 4Cs: Cut, Clarity, Colour, and Carat weight.

Certified Diamond Dealer status is paramount to Asian Star. They hold certifications from leading gemmological laboratories, including the Gemmological Institute of America (GIA), the International Gemmological Institute (IGI), and the Hoge Raad voor Diamant (HRD). These certifications provide independent verification of a diamond's authenticity and quality, offering an assurance of value to their clients.

Expertise is another pillar of Asian Star's success. The company boasts a team of seasoned diamond professionals with unparalleled knowledge of the industry. Point Here, consider mentioning specific areas of expertise, like diamond sourcing regions, cut variations, or market trends. This showcases their in-depth knowledge.

From sourcing and evaluating rough diamonds to the intricacies of diamond cutting and polishing, their team possesses a wealth of experience that allows them to cater to the most discerning clientele.

Innovation is the lifeblood of any thriving business. Asian Star recognizes this, continuously pushing boundaries and embracing cutting-edge technologies to enhance its operations. 

A Commitment to Sustainability: Ethical Sourcing and Responsible Practices

In today's world, ethical sourcing is no longer a luxury; it's a necessity. Asian Star is a champion for responsible practices, adhering to stringent ethical guidelines throughout their supply chain. They source diamonds only from conflict-free zones, ensuring their business practices align with the Kimberley Process Certification Scheme (KPCS) that combats the trade in conflict diamonds.

Asian Star understands that sustainability extends beyond ethical sourcing. They actively implement environmentally friendly practices within their operations, minimizing their environmental footprint and preserving natural resources for future generations. Point Briefly discuss some specific sustainable practices implemented by Asian Star. This could be waste reduction initiatives, energy-efficient technologies, or partnerships with environmental organizations.

A Legacy That Shines On: The Future of Asian Star

As Asian Star embarks on its next chapter, the company remains committed to its core values of quality, integrity, and innovation. They are constantly exploring new avenues, expanding their global reach and forging strategic partnerships with leading players in the diamond industry. With a focus on providing exceptional customer service and building lasting relationships, Asian Star continues to solidify its position as a trusted Certified Diamond Dealer for years to come.

The story of Asian Star is more than just a chronicle of business success. It's a testament to the transformative power of vision, dedication, and an unwavering commitment to excellence. As they continue to illuminate the world with the brilliance of their diamonds, Asian Star's legacy promises to shine ever brighter in the years to come.

[mediterraneanstar]

It's such a pity that not many people in this fandom speak Italian, because there's this italian gemmologist (Andrea Falcioni) who makes these hilarious skits on youtube...

He's like an evil middle-aged Akeboshi who likes to torment his apprentices 🤣🤣🤣