Prehnite 4mm Coin Faceted A Grade - 15-16 Inch Shape_Oval from pastel to bright to

from pastel to bright to dark

Topaz occurs in a wide range of natural colors

tranquility

decays and is exposed to mineral-rich water

Carnelian is a glassy

Prehnite 4mm Coin Faceted A Grade - 15-16 Inch Shape_Oval from pastel to bright toPrehnite 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.