Education

GEMHARDNESSABSOLUTE HARDNESS
Diamond101600
LustouR9.5800
Moissanite9400
Ruby9400
Sapphire9400
Cubic Zirconia8.5300
Alexandrite8.5300
Topaz8200
Spinel8200
Emerald8200
Aquamarine8200
Morganite7.5150
Tourmaline7.0 - 7.5100 - 150
Iolite7.0 - 7.5100 - 150
Amethyst7100
Smoky Quartz7100
Quartz7100
Ametrine7100
Kunzite7100
Citrine7100
Aventurine7100
Zircon6.5 - 7.586 - 150
Garnet6.5 - 7.586 - 150
Tanzanite6.5 - 7.086 - 100
Peridot6.5 - 7.086 - 100
Agate6.5 - 7.086 - 100
Onyx6.5 - 7.086 - 100
Chalcedony6.5 - 7.086 - 100
Moonstone6.0 - 6.572 - 86
Fire Opal5.5 - 6.560 - 86
Opal5.5 - 6.560 - 86
Pocket Knife5.560
Turquoise5.0 - 6.048 - 72
Tooth548
Glass421
Malachite3.5 - 4.015 - 21
Coral3.0 - 4.09 - 21
Penny3.515
Pearl2.5 - 4.06 - 21
Fingernail2.2 - 2.54 - 6
Amber2.0 - 2.53 - 6
Pencil Lead11
METALHARDNESSABSOLUTE HARDNESS
Tungsten Carbide9400
Vitalium9400
Ceramic9400
Stainless Steel7.0 - 8.0100 - 200
Rhodium672
Titanium672
Paladium548
Zirconium548
Cobalt548
Serinium548
Steel4.0 - 4.521 - 34.5
Platinum4.0 - 4.521 - 34.5
Iron421
10K Gold421
14K Gold3.0-4.09 - 21
Brass39
18K Gold2.757.5
Silver2.5 - 3.06 - 9
24K Gold2.56

Click here for LIVE PRICEGold: $1268.40 - Silver: $16.38 - Platinum: $863.00 as of: 6/22/2018

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