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Minearl class-sulfide
Obsidian from Mexico
Fluorite and galena from County Durham ukSize-9
as well as in sedimentary deposits and some igneous rocks
Silicon carbide Minearl class-sulfideSilicon Carbide ( Carborundum) Mineral Rough Size 10. 2cm x 6. 1cm x 3. 8cm Weight 300g You will receive the item in the photo Silicon carbide is a super hard synthetic ceramic primarily produced in electric arc furnaces using high purity silica Sand and petroleum coke. In nature it appears as the extremely rare mineral moissanite, which is found almost exclusively in meteorites and upper mantle igneous rocks. Crystal system: there are over 200
US$ 11550.00
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