Prehnite Natural 8X10mm Freeform Cut - 15-16 Inch missing Dog Teeth Amethyst has a

Dog Teeth Amethyst has a purple and white striped appearance due to its combination of Amethyst and White Quartz

many people believe that diamonds are formed from coal

Aquamarine is a transparent to translucent stone ranging from cerulean blue to light blue in higher grades

Opalite is known by several other names

Prehnite Natural 8X10mm Freeform Cut - 15-16 Inch missing Dog Teeth Amethyst has aPrehnite 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.