Prehnite 8mm Coin Faceted A Grade - 15-16 Inch 14x40mm white and occasionally gray or

white and occasionally gray or brown

and considered a symbol of eternal life by the Egyptians as well as being a favorite jewel of Cleopatra

Tourmaline has often been confused with other stones

By soaking the stone in a non-toxic chemical solution

check out The Identification of Zachery Treated Turquoise

Prehnite 8mm Coin Faceted A Grade - 15-16 Inch 14x40mm white and occasionally gray orPrehnite 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.