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Soâ¦how do beryl and chromium and vanadium get together to form emerald? How emeralds are formed. Plate tectonics shifts rock formations all over the place. Well, thatâs too much of an oversimplification, but it is the reason why ocean crust sometimes ends up scrunched together with continental rock. Part of the detailed explanation of plate tectonics.
Gems form in many different environments in the Earth. We will examine the most common and important environments and formation processes in this lecture. It is important to distinguish where gems are formed from where they are found. Almost all gems are formed below the Earth's surface. Some are brought to the surface through mining. Some are brought to the surface through earth processes (faulting, folding, large scale uplift, volcanism).