Prehnite 3mm Round Faceted A Grade - 15-16 Inch Australian with a Mohs Hardness of

with a Mohs Hardness of 8

Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks

Dispel Lethargy

The color of Green Aventurine comes from Fushite particles within the quartz

red and yellow-orange

Prehnite 3mm Round Faceted A Grade - 15-16 Inch Australian with a Mohs Hardness ofPrehnite 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.