Chemically, turquoise is a hydrated copper/aluminum phosphate, of aggregate

Tourmalines are gems with an incomparable variety of colors. According

The term “precious” topaz was originally used to distinguish yellow and orangish

Few gems have attained the popularity of tanzanite in such a short period. The gem was only discovered in the 1960s, and soon the demand raised the prices to a very respectable level. The government of Tanzania promoted this gem with an expertise that would make DeBeers proud. Tanzanite is a beautiful gem, but with moderate hardness and perfect cleavage, it is less than ideal for wearing in

Spinel is the great impostor of gemstone history: many famous rubies in crown jewels

Peridot belongs to the forsterite-fayalite mineral series, which is part of the olivine