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NHM's gem and mineral collection of about 150,000 specimens is the most significant in the country, west of the Smithsonian. See More


Gem & Mineral Council 2014 Events

Saturday, January 17, 2015: An Evening at a Collector's Home

Our first meeting of 2015 will kick off at our emeritus curator's home.

In addition, Tony Kampf will be giving a talk on fakes and frauds. Many mineral specimens (and indeed most gemstones) have been “doctored” in some way to improve their appearance and their salability. Unfortunately, the practice of “enhancement” is a slippery slope, sometimes leading to outright fakery and fraud. He will be looking into the critical and often humorous ways of the many different techniques for enhancing and faking mineral specimens (and some gems) and the clues to look for in detecting them. For more information, click here.

By invite only.



For any additional information about these events, please contact the Gem & Mineral Council at or (213) 763-3326.


Temporary Exhibit: The Aurora Butterfly of Peace


The Natural History Museum of Los Angeles County was pleased to present the Aurora Butterfly of Peace, which was on display in the Gem Vault through June, 2014. More information here!

The Aurora Butterfly of Peace: a collection made of 240 natural fancy colored diamonds. Photo: R. Weldon. Copyright: GIA.