#gem geology

[amnhnyc]

Today’s Exhibit of the Day? It’s one of the largest amethyst geodes in the world! At about 13 ft (4 m) tall and 9,000 lbs (4,082 kg), this giant weighs about as much as three compact cars. It was born when molten magma poured from the Earth’s crust some 135 million years ago. While its dazzling purple crystals might catch your eye, this geode would have originally been composed of colorless quartz—its distinctive amethyst color deriving from millenia of natural radiation, heat, and trace contaminants. 

You can spot this geode, and other sparkly specimens, in the Museum’s Mignone Halls of Gems and Minerals. We're open daily from 10 am-5:30 pm! Plan your visit.

Photo: D. Finnin/ © AMNH

[gottastim]

blob_blobber on ig

[dozydawn]

diamonds with garnet inclusions

[noosphe-re]

[geologyin-blog]

This is a library of a GEOLOGIST LOL

[retrogamingblog2]

Gem Carved Pokemon made by GeorgefBoutique

[comfycat3]

I LOVE FLUORESCENCE !!!!!!!!

(kunzite yum i wanna chew on it like an ice cube)

[iloveabortions]

Vanadinite & Baryte | ACF Mine, Mibladen, Midelt Province, Drâa-Tafilalet Region, Morocco

[srlgemstone]

Lace Agate Pair

Every detail is beautiful. It has a mesmerizing dimensionality.

[geologystims]

Amethyst Heart | fasanaminerals on Instagram

[amnhnyc]

Have you ever heard of the Subway Garnet? This piece of almandine was discovered in 1885 under 35th Street between 7th Avenue and Broadway, near Herald Square. Its nickname is misleading, because it was actually uncovered during excavation for sewer pipes. Construction for New York City subways did not begin until 1900, more than a decade after this specimen was found—but who wants to get close to the Sewer Garnet?

Photo: D. Finnin / © AMNH

[gottastim]

koroit.opal.company on ig

[dozydawn]

garnet inclusion inside a diamond

[overthemoonminerals]

Smoky Quartz with Black Tourmaline and Hyalite Opal from Erongo, Namibia

[geologyin-blog]

True story!

[retrogamingblog2]

Gem Carved Pokemon made by GeorgefBoutique