In mineralogy, emeralds belong to the same beryl group as aquamarine and beryl. Beryl is a silicate containing beryllium and aluminum. Its composition often contains potassium, sodium, kalcium, magnesium, järn, lithium, bismuth, mangan, cesium, krom, vanadium, nickel and other trace elements. Some of them are pigment ions, causing beryl to have yellow (guld) pink or […]
