This Prehnite is natural gemstone which is Mint Green color, it’s Originates from South Africa and it’s exact weight is 5.91ct the measurements are 13.61×10.11×5.37mm, the shape and cut of this stone is Oval Cabochon. It’s graded Transparent and clarity is Good. This 5.91ct Green natural Prehnite Gem is available for ready to ship anywhere in the world. You can also select Certification and shipment method as optional.
Properties Of Prehnite
Chemical Composition: Ca2Al(AlSi3O10)(OH)2 Basic calcium aluminum silicate
Hardness: 6 to 6.5
Specific Gravity (Density): 2.82 to 2.94
Refractive Index: 1.611 to 1.669
About Prehnite Gemstone
Prehnite is a beautiful gem with a pearly to velvety look that glows with color in well-faceted gems. Prehnite is a translucent to transparent gem-quality hydrated calcium aluminum silicate. Prehnite was a rare collector’s gemstone, but new deposits have now made it more readily available. It has a vitreous to pearly luster. Its color is usually a soft apple-green, which is quite unique to prehnite, but it can also occur in rarer colors including yellow, orange and blue. Prehnite may also be tumbled or beaded and it is a popular ornamental material used for decorative carvings. The most popular shapes include traditional oval, cushion, and round shapes. Fancy shapes are not as popular but can be found, including hearts, trillions, and pears. Cat’s eye prehnite is known but extremely rare; these are cut en cabochon to maximize chatoyancy. Some of the most important deposits come from Africa (Namibia, South Africa), Australia (Western Australia, Northern Territory), Canada, China, Germany, Scotland, France and the United States (New Jersey, Pennsylvania, and Virginia). Rare, orange colored prehnite has been discovered in South Africa. Quebec, Canada is known to produce prehnite with distinct, individual crystals. Prehnite is not known to be treated or enhanced in any way.