It's been years since I actually have seen the 100 point hardness scale I mentioned. I looked through most all of my Rock library and did not find it. When searching online I found a similar scale called Knoop.........
mineral scale: KNOOP
talc or graphite----------------------1
gypsum or sulfur----------------------32
calcite-------------------------------135
fluorite------------------------------163
apatite-------------------------------430
orthoclase or feldespar---------------560
quartz--------------------------------820
topaz---------------------------------1340
corundum------------------------------1800
diamond-------------------------------7000
Read more:
forum.rocktumblinghobby.com/thread/69013/located-bulk-silica-product-grit?page=2#ixzz3NyBE2scJAnd a link to a more indepth explanation of different hardness measurements.
people.timezone.com/library/itsabouttime/itsabout001039don
Found some more materials Don :
Hardness of Materials MOHS
Substance Number Substance Number
Agate 6-7 Indium 1.2
Alabaster 1.7 Iridium 6-6.5
Alum 2-2.5 Iridosmium 7
Aluminum 2-2.9 Iron 4-5
Alundum 9+ Kaolinite 2.0-2.5
Amber 2-2.5 Lead 1.5
Andalusite 7.5 Lithium 0.6
Anthracite 2.2 Loess (0°) 0.3
Antimony 3.0-3.3 Magnesium 2.0
Apatite 5 Magnetite 6
Aragonite 3.5 Manganese 5.0
Arsenic 3.5 Marble 3-4
Asbestos 5 Meerschaum 2-3
Asphalt 1-2 Mica 2.8
Augite 6 Opal 4-6
Barite 3.3 Orthoclase 6
Bell-metal 4 Osmium 7.0
Beryl 7.8 Palladium 4.8
Bismuth 2.5 Phosphorus 0.5
Boric Acid 3 Phosphorbronze 4
Boron 9.5 Platinum 4.3
Brass 3-4 Plat-iridium 6.5
Cadmium 2.0 Potassium 0.5
Calamine 5 Pumice 6
Calcite 3 Pyrite 6.3
Calcium 1.5 Quartz 7
Carbon 10.0 Rock Salt (halite) 2
Carborundum 9-10 Ross' Metal 2.5-3.0
Cesium 0.2 Rubidium 0.3
Chromium 9.0 Ruthenium 6.5
Copper 2.5-3 Selenium 2.0
Corundum 9 Serpentine 3-4
Diamond 10 Silicon 7.0
Diatomaceous Earth 1-1.5 Silver 2.5-4
Dolomite 3.5-4 Silver Chloride 1.3
Emery 7-9 Sodium 0.4
Feldspar 6 Steel 5-8.5
Flint 7 Stibnite 2
Fluorite 4 Strontium 1.8
Galena 2.5 Sulfur 1.5-2.5
Gallium 1.5 Talc 1
Garnet 6.5-7 Tellurium 2.3
Glass 4.5-6.5 Tin 1.5-1.8
Gold 2.5-3 Topaz 8
Graphite 0.5-1 Tourmaline 7.3
Gypsum 1.6-2 Wax (0°) 0.2
Hematite 6 Wood's Metal 3
Hornblende 5.5 Zinc 2.5
Comparison of Hardness Values of Various Materials
on Mohs and Knoop Scales
Material Formula Mohs Value Knoop Value
Talc 1 ...
Gypsum 2 32
Cadmium ... 37
Silver ... 60
Zinc ... 119
Calcite 3 135
Fluorite 4 163
Copper ... 163
Magnesia ... 370
Apatite 5 430
Nickel ... 557
Glass (soda lime) 530
Feldspar (orthoclase) 6 560
Quartz 7 820
Chromium ... 935
Zirconia ... 1160
Beryllia ... 1250
Topaz 8 1340
Garnet 1360
Tungsten Carbide Alloy ... 1400-1800
Zirconium Boride ... 1550
Titanium Nitride 9 1800
Tungsten Carbide ... 1880
Tantalum Carbide ... 2000
Zirconium Carbide ... 2100
Alumina Al2O3 ... 2100
Beryllium Carbide ... 2410
Titanium Carbide ... 2470
Silicon Carbide ... 2480
Aluminum Boride ... 2500
Boron Carbide ... 2750
Diamond 10 7000