Beryl

Pingwu beryl mine,Huya township, Mt Xuebaoding, Pingwu Co., Mianyang, Sichuan, China

Be3Al2Si6O18

Crystal System: hexagonal
Colour: colorless, green, blue, yellow, white or pink
Habitus: prismatic to tabular
Hardness: 7½ - 8
Fracture: conchoidal or uneven
Cleavage: imperfect/fair {0001}
Density: 2.63 - 2.92 g/cm3 
Origin and geological occurrence: it is found in granites and granite pegmatites; also in mafic metamorphic rocks, in low-to high-temperature hydrothermal veins and in vugs in rhyolite.

www.mindat.org
Smorf link


Samples:

 BERILLO.jpg

9C.3 Beryl