Saturday, October 22, 2011

Gemstone Hardness Comparison



Mineral used for comparisonSimple HardnessHardness


1
Diamond
140,000.00


2
Ruby, Sapphire, Alexandrite, Chrysoberyl
1,000.00


3
Aquamarine, Emerald, Morganite, Spinel, Topaz
175.00


4
Amethyst, Citrine, Garnet, Iolite, Kunzite, Peridot, Tanzanite, Tourmaline, ZirconScratches window glass
120.00


5
Diopside, Lapis lazuli, Orthoclase, TurquoiseCan be scratched with a steel file
37.00


6
Apatite, Obsidian, Sphene, GlassCan be scratched with a knife
6.50


7
Coral, Fluorite, PearlCan easily be scratched with a knife
5.00


8
Calcite, IvoryCan be scratched with a copper coin
4.50


9
Amber, GypsumCan be scratched with a fingernail
1.25


10
TalcCan be scratched with a fingernail
0.03

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