Prehnite 8mm Double Heart Faceted - 15-16 Inch july_ruby Turquoise beads found in Iraq

Turquoise beads found in Iraq date back to 5000 BCE

Brazilian Amazonite is an opaque blue to green to light green stone

natural Sleeping Beauty Turquoise continues to rise in value

Mexican Laguna Lace Agate is one of the most prized agates in the world

It can be colorless

Prehnite 8mm Double Heart Faceted - 15-16 Inch july_ruby Turquoise beads found in IraqPrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.