Prehnite 6mm Round AAA Grade - 15-16 Inch hps_07092026 Hackmanite is very reactive under

Hackmanite is very reactive under UV light

dainty necklace

dark specks or veins

which occurs in many colors

Prehnite 6mm Round AAA Grade - 15-16 Inch hps_07092026 Hackmanite is very reactive underPrehnite 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.