Aquamarine, a blue-green variety of beryl from Tanzania. Specimen is approximately 2 inches (5 centimeters) across.
Uses Gemstones, the primary ore of beryllium.
Color bluish green, light yellow, golden yellow, pink, white, colorless
Streak colorless
Luster vitreous
Diaphaneity transparent to translucent
Cleavage imperfect
Luster vitreous
Hardness 7.5 - 8
Specific Gravity 2.6 - 2.8
Distinguishing Characteristics hexagonal crystal form, green color, hardness
Crystal System hexagonal
Chemical Classification silicate
Chemical Composition beryllium aluminum silicate , Be3Al2Si6O18

Beryl is a transparent rock that comes in the colors of green, blue yellow, colorless, and red. "Beryl" comes from the Greek word "beryllos" which means "precious blue-green color of sea water stone". Some minerals that are beryl include Aquamarine, Emerald.