Prehnite 4mm Round AAA Grade - 15-16 Inch R1630 until the 17th century Crystal

until the 17th century Crystal Quartz was believed to be permanently frozen water

with inclusions of white to colorless translucent or transparent

West African Jade is a complex Calcium Aluminum Silicate and is a Nephrite Jade

This lava rolled across the landscape

It can be easily confused with other minerals due to its variety of colors and formations

Prehnite 4mm Round AAA Grade - 15-16 Inch R1630 until the 17th century CrystalPrehnite 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.