Beryl is a mineral composed of beryllium silicate and aluminium.
Green beryl is named Emerald, blue beryl Aquamarine, pink beryl Morganite, white beryl Goshenite, red beryl Bixbiite, and yellow beryl Heliodore.
A green beryl that does not contain either chromium or vanadium cannot be named an Emerald and must always be called « Green beryl »
There exists a photosensitive blue beryl called « Maxixe beryl », discovered in 1917 in the Maxixe mine, Minas Gerais state, Brazil. This dark blue beryl loses its color and fades to a light yellow when exposed to sunlight. The color can be temporarily restored by the irradiation of the stones, although exposure to sunlight will once again fade them to yellow.
In 2003, the discovery of a dark blue beryl in the Yukon, Canada was made. This beryl has been named « True Blue » and apparently owes its color to an unusually high concentration of iron in the stone.
Another unusual beryl is « Riesling beryl », discovered in Germany in the 1840’s. This beryl is a pale green color with a golden yellow flash. Other pockets of similar colored beryl were discovered in Brazil in 2002 and 2004, although some collectors don’t consider it true Riesling beryl, and the price of the Brazilian material is nowhere near that of the German material.
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