Gem Silica Small 3pc Slab R0086 its oldest known use being

its oldest known use being in Egypt more than five thousand years ago

but those varieties are transparent

It is often thought of as an all-black stone

often called the "Super Seven" or "Melody Stone" contains Amethyst

This variation mixes Blue Tiger Eye with Yellow Tiger Eye to bring out the best of each of the two stones

Gem Silica Small 3pc Slab R0086 its oldest known use beingGem Silica is the rarest and highest form of Chrysocolla, crystallized and infused in Quartz. Gem Silica occurs in a vivid blue green color due to the presence of copper in the stone and is free of inclusions of other minerals. It was named and first described by the Greek philosopher and botanist Theosphrastus in 315 BCE.