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Botryoidal hematite From Morocco
Aegirine in synite from Bratthagen
Silicon Carbide ( Carborundum) Mineral Rough
Sugilite from wessels mine kalahari manganese field northern cape province South Africa
Namibia Size- 5cm x 3
Quartz group Botryoidal hematite From MoroccoQuartz group from Brazil Size 11cm x 6. 9cm x 6. 2cm Weight 374g You will receive the item in the photo Quartz is a ubiquitous rock forming mineral composed of silicon dioxide. Quartz is classified as an oxide mineral, but is structurally classified as an tectosilicate. In this structure every silica tetrahedron shares all of its oxygen atoms with neighbouring tetrahedra to form a robust three dimensional framework. Quartz crystallizes in the trigonal
US$ 119.99
US$ 139.99
