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2. Mica - Wikipedia

   en.wikipedia.org/wiki/Mica

   In the paint industry, ground mica is used as a pigment extender that also facilitates suspension, reduces chalking, prevents shrinking and shearing of the paint film, increases the resistance of the paint film to water penetration and weathering and brightens the tone of colored pigments. Mica also promotes paint adhesion in aqueous and ...

3. Bort - Wikipedia

   en.wikipedia.org/wiki/Bort

   Bort-like heavily twinned diamond from Congo. Bort is commonly used as an abrasive. Smaller flakes and particles are used as an additive for scouring or polishing pastes and agents. Larger particles can be added to cutting, drilling and grinding tools to improve their lifespan and substantially increase their efficiency. [4]

4. List of inorganic pigments - Wikipedia

   en.wikipedia.org/wiki/List_of_inorganic_pigments

   Copper pigments. Han purple: BaCuSi 2 O 6. Cobalt pigments. Cobalt violet (PV14): Co 3 (PO 4) 2. Manganese pigments. Manganese violet: NH 4 MnP 2 O 7 (PV16) manganic ammonium pyrophosphate. [2] Gold pigments. Purple of Cassius: Gold nanoparticles suspended in tin dioxide - Au x • SnO 2. Arsenic pigments. London purple As 2 O 3. [3]

5. Carbonado - Wikipedia

   en.wikipedia.org/wiki/Carbonado

   Carbonado, commonly known as black diamond, is one of the toughest forms of natural diamond. It is an impure, high-density, micro-porous form of polycrystalline diamond consisting of diamond, graphite , and amorphous carbon , with minor crystalline precipitates filling pores and occasional reduced metal inclusions. [ 1 ]

6. List of mineral tests - Wikipedia

   en.wikipedia.org/wiki/List_of_mineral_tests

   Color of the mineral's powder. This can be found by rubbing the mineral onto a concrete. ... Orthoclase Feldspar is 6, Quartz is 7, Topaz is 8, Corundum is 9 and ...

7. Pigment - Wikipedia

   en.wikipedia.org/wiki/Pigment

   A pigment is a powder used to add color or change visual appearance. Pigments are completely or nearly insoluble and chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use.