Tumbled Prehnite / 20-40mm AVG - 1 KILO LOT

Quantity: 1 kilogram

Average size range: 20 to 40 millimeters

Prehnite is a semi-brittle gemstone that most often forms as globules, stalactites, or in botryoidal growths. While not a zeolite itself, it is often found near zeolite deposits like heulandite or stilbite, and it was first found in what is now South Africa in the late 1700s.