The chemical properties of diamonds is very stable, not easily soluble in acid and alkali. However, in a pure oxygen, the heated... Read more

It has become a small bead is the pearl. Pearl colors are mainly white, pink and light yellow , A pearl luster, its surface like... Read more

Lapis lazuli is a sodalite family minerals; lapis lazuli of the formula , in which regular part of sodium for potassium replacem... Read more

I like the store in the deep road. Opal Stone types, including white opal stone, black opal stone, crystal opal stones, fire opa... Read more