THE BASIC PRINCIPLES OF GEMSTONES

Grandidierite is a rare greenish-blue gemstone named soon after Alfred Grandidier. It is often shown as one of the top 10 rarest gems on the earth.Bloodstone, often called heliotrope, is a green gemstone dotted with vibrant red spots of iron oxide.Chalcedony is the great-grained assortment of the silica mineral quartz. It has a waxy luster and seem