Both are members of the ettringite group of minerals and have similar crystal habit density luster and often have the same bright yellow color. Raw polished carved and semi finished. It is cut only for collection because it is very fragile. Select your favorite sturmanite and choose to buy now or place a bid. It is said to be a stone of empowerment and freedom and is a mixture of red cuprite and blue green chrysocolla which are both copper based stones.
It is difficult to distinguish ettringite from sturmanite. View all products sort by. It crystallises in the tetragonal system and it has a moh s hardness of 2 5. Sturmanite has a bright yellow to amber colour and falls in the ettringite group. See the pictures.
We offer the best in gemstones and crystals in many forms. South african material has yielded minute stones some of which may have been labeled sturmanite. Ca 6 fe 3 al mn 2 2 so 4 2 b oh 4 oh 12 25 h 2 o hydrated calcium iron aluminum manganese sulfate tetrahydroxoborate hydroxide discovered in 1981. Sturmanite is an extremely rare gem and a member of the ettringite group of minerals that includes charlesite ettringite sturmanite and thaumasite. Rare mineral it is found in the kalahari in south africa and in russia in the caucasus.
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Display 30 88 80 grams sturmanite on matrix n chwaning ii mine northern cape prowince south africa. It honors the name of the canadian mineralogist b. Our gemstones are crafted into beautiful works of art by accentuating their natural beauty and allowing it to shine through. Each stone shares their story through millions of years of creation. Sonara sunrise is a mix of cuprite and chrysocolla and is a trade name used to describe an uncommon stone from one place in mexico.See pictures of the mines other pictures. We showcase their radiance as orbs towers cubes hearts palm stones jewelry tumbled and in. Sturmanite is a rare sulfate mineral with the chemical formula ca 6 fe 3 2 so 4 2 5 b oh 4 oh 12 25 h 2 o. Cassiterite is a durable gemstone with tremendous dispersive fire especially visible in properly cut pale colored stones. Sturmanite is named in honor of bozidar darko sturman 1937 canadian mineralogist royal ontario museum toronto ontario canada.
125 92 179 88. Sturmanite group s. Our individual sellers are located all over the world bringing you the most unique and beautiful gemstones. Ettringite ettringite is not generally facetable. Gem rock auctions sells verified sturmanite online in all shapes and sizes.
Gem rock auctions sells verified sturmanite online in all shapes and sizes. 125 92 179 88. See pictures of the mines other pictures. Display 30 88 80 grams sturmanite on matrix n chwaning ii mine northern cape prowince south africa. We offer the best in gemstones and crystals in many forms.
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Ettringite ettringite is not generally facetable. It is difficult to distinguish ettringite from sturmanite. Both are members of the ettringite group of minerals and have similar crystal habit density luster and often have the same bright yellow color.
