Rock Creek Sapphires

Gems from Montana

A spectrum of color in sapphires from the Rock Creek Mine, Montana, USA. Photo by Aaron Celestian.
Donation to NHMLA of rough sapphire crystals from Rock Creek. Photo by Stan Celestian.
A 59.5 ct unheated rough sapphire from Rock Creek. As of June 2018, this is the largest crystal that I know of from Montana. A slightly larger one has been found recently. Photo by Aaron Celestian.
The “Montana Princess” is a 12.62 cts heated blue-green sapphire from Rock Creek. As far as I know, it is the largest blue sapphire gem from Montana. Photo by Aaron Celestian.

--

--

Keeping science accessible. Researching how minerals can be used to solve problems like climate change, pollution, and disease. @ NHMLA, USC, NASA-JPL

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Aaron Celestian, Ph.D.

Keeping science accessible. Researching how minerals can be used to solve problems like climate change, pollution, and disease. @ NHMLA, USC, NASA-JPL