Posts Tagged ‘ fortune-tellers ’

Beryl

September 16, 2009
By precious stones

The beryl is a compound of silicates of beryllia and alumina, with the formula 3BeOSiO2 + Al2O3,3SiO2, or 3BeO,Al2O3,6SiO2. It differs very little indeed from the emerald, with the exception of its colour. In the ordinary varieties this is somewhat poor, being mostly blue, or a dirty or a greenish yellow; the better kinds,...
Read more »

Tags: , , , , , , , , ,
Crystal & stones : Properties and composition of precious stones | No Comments »

Search Crystal & stones

Gemstones

ambre pierre polie

Popular articles

Archives