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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.
The Emerald is a member of the Beryl (beryllium aluminum silicate) family. The crystal structure of the emerald, the February birthstone, is hexagonal. Elements of chromium in the crystal produce the color, whilst inclusions in the stone create what is called the jardin, or garden, of the emerald. For those who were born in the month of May the Emerald is the traditional birthstone.