Prehnite 3mm Round Faceted A Grade - 15-16 Inch Australian olive green and gray to

olive green and gray to green

with a Mohs Hardness of 8

which occurs in many colors

Weight: grams: 60-90 grams

Citrine is a transparent Quartz

Prehnite 3mm Round Faceted A Grade - 15-16 Inch Australian olive green and gray 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.