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FRUMEHI-TECHGROUP

FRUMESHI-TECHGROUP IS A GROUP THAT MINES PRECIOUS STONES AND MINERALS. WE ALSO DO MECHANIZED FARMING.

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Cassiterite is a tin oxide mineral, SnO₂. It is generally opaque, but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite has been the chief tin ore throughout ancient history and remains the most important source of tin today. Crystal system: Tetragonal crystal system Crystal class: Ditetragonal dipyramidal (4/mmm); H-M symbol: (4/m 2/m 2/m) Optical properties: Uniaxial (+) Mohs scale hardness: 6–7 Unit cell: a = 4.7382(4) Å, c = 3.1871(1) Å; Z = 2 Did you know: Cassiterite sometimes is used as a minor gemstone, but mostly for the collectors of minerals.

GLASS SAND

Glass Sand A special type of sand that is suitable for glass making because of its high silica content, and its low content of iron oxide, chromium, cobalt and other colourants. ... The sand contains about 88 to 99% of silica with a few percentages of iron, titanium, cobalt, and other materials.

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