specification of beryl group gemstone RSS

Beryl is a beryllium aluminium silicate with the chemical formula Be3Al2(SiO3)6. The hexagonal crystals of beryl may be very small or range to several meters in size. Terminated crystals are relatively rare. Pure beryl is colorless, but it is frequently tinted by impurities; possible colors are green, blue, yellow, red, and white.   Beryl Properties Chemical Composition:  Beryllium Aluminium Silicate (Be3Al2(SiO3)6; Trace elements are Cr, V, Fe, Mn, etc. Colors / Varieties:  Green - Emerald (Cr/V/Fe) Green - Green Beryl (No Chromium) Colorless - Goshenite Blue - Aquamarine Yellow - Yellow Beryl Golden - Heliodor Pink - Morganite Red -...

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