Smithsonian Mineral Hall

[@asanjog25]

mam plz suggest a good video on optical properties of mineral...plzzzzz

[@billbailey4615]

I hope you are not going to make us wait long for your work on metamorphic rocks.Grrrreat videos,thanks for your work.

[@AidaAwad]

I'll be posting a narrated tour version of this video very soon! Sorry for the delay!

[@anaiahgraham4754]

TO TELL YOU THE TRUTH MINERAL'S ARE BETTER THAM GEMS BECAUSE THEY ARE MORE MINERALS THE GEMS