Prehnite 10mm Round AAA Grade - 15-16 Inch Barrel Blue This item is treated and

This item is treated and dyed agate

Store various findings and beads in the Stackable Drawers

All gemstones are fascinating and special

Cubic Zirconia can be truly colorless

Prehnite 10mm Round AAA Grade - 15-16 Inch Barrel Blue This item is treated andPrehnite 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.