Mohs' (hardness) scale [ A standard of ten minerals by which the hardness of a mineral may be rated. The scale includes, from softest to hardest and numbered one to ten: talc; gypsum; calcite; fluorite; apatite; orthoclase; quartz; topaz; corundum;, and diamond ] ● Mohssche (Hrte-)...
Hardness Material Absolute Hardness 1 Talc (Mg3Si4O10(OH)2) 1 2 Gypsum (CaSO4·2H2O) 3 3 Calcite (CaCO3) 9 4 Fluorite (CaF2) 21 5 Apatite (Ca5(PO4)3(OH-,Cl-,F-)) 48 6 Orthoclase (KAlSi3O8) 72 7 Quartz (SiO2) 100 8 Topaz (Al2SiO4(OH-,F-)2) 200 9 Co...
A scale for classifying minerals based on relative hardness, determined by the ability of harder minerals to scratch softer ones. The scale includes the following minerals, in order from softest to hardest: 1. talc; 2. gypsum; 3. calcite; 4. fluorite; 5. apatite; 6. orthoclase; 7. quartz...
The Mohs Hardness Scale is a standard that indicates the hardness of minerals. It was first proposed by German mineralogist Frederich Mohs in 1822.
The meaning of MOHS' SCALE is a scale of hardness for minerals that ranges from a value of 1 for talc to 10 for diamond.
MohsHardnessScale
Mohs scale definition: a scale of hardness used in mineralogy. Its degrees, in increasing hardness, are: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; feldspar 6; quartz 7; topaz 8; sapphire 9; diamond 10. Abbreviation. See examples of MOHS SCALE u
Mohs Scale of Hardness HardnessExample 10diamond 9corundum (ruby, sapphire) 8beryl (emerald, aquamarine) 7.5garnet 6.5-7.5steel file 7.0quartz (amethyst, citrine, agate) 6feldspar (spectrolite) 5.5-6.5most glass 5apatite 4fluorite 3calcite, a penny ...
Mohs HardnessTypical Material 1 Talc 2 Gypsum, Rock salt 2.5 Fingernail, pure gold, silver, aluminum 3 Calcspar (calcite), copper coin (penny) 4 Fluorspar (fluorite) 4.5 Platinum, iron 5 Apatite 6 Felspar, orthoclase, titanium, spectrolite 6.5 Steelfile, iron pyrite, glass, vitreous pure sil...
gathered 10 gemstones that represent the most common gemstone families (talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and diamond) and set about scratching them against each other, until he was able to develop a hierarchy of scratchability - theMohs hardness ...