Prehnite Natural 8mm Bicone Faceted - 15-16 Inch Gemstone Green is the most common

Green is the most common color for Aventurine

Turquoise is one of the oldest known gemstones

but it can also occur as orange

it offers a way to work a neutral color into your designs

occasionally mingled with rust-brown

Prehnite Natural 8mm Bicone Faceted - 15-16 Inch Gemstone Green is the most commonPrehnite 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.