Be3Al2(SiO3)6::Cr - 9.CJ.05 (Strunz)
(from Bogota, Colombia [rough], from Minas Gerais, Brazil [cut])
Emerald is a variety of the mineral called beryl, it contains chromium and vanadium, which give it its characteristic emerald green color. The big one, is a Colombian Emerald Rough, but is less clear than the other. The little one, is a cut gem (emerald cut to minimize impacts), very beautiful and clear, with a distinctive color of its origin (Brazil).
- Neil DeGrasse Tyson (via whats-out-there)
Just in case it’s not raining where you live, here’s the regular version too.