Prehnite 9x13mm Long Faceted Heart Bead - 15-16 Inch Stone Type_Apatite Opal is a natural gemstone

Opal is a natural gemstone made from silica mineral and 90% are found in Australia

Selenite is a crystal formed from the mineral gypsum

each cavity is slightly larger (or smaller) than the other to give the user the ability to tighten the crimp properly

and beads per strand counts may vary slightly from what is shown

While sometimes marketed as jasper

Prehnite 9x13mm Long Faceted Heart Bead - 15-16 Inch Stone Type_Apatite Opal is a natural gemstonePrehnite 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.