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Rutile

Hardness = 6
6.7 6.7
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Jet

Hardness = 2.5
6.7 6.7
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Morganite

Hardness = 7.5
6.6 6.6
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Howlite

Hardness = 3.5
6.6 6.6
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Sardonyx

Hardness = 7
6.6 6.6
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Platinum

Hardness = 4
6.6 6.6
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Rhodonite

Hardness = 5.5 to 6.5
6.5 6.5
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Diopside

Hardness = 5 to 6
6.5 6.5
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Turquoise

Hardness = 5 to 6
6.5 6.5
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Spinel

Hardness = 8
6.5 6.5
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Peridot

Hardness = 6.5
6.5 6.5
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Spodumene

Hardness = 7
6.5 6.5
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Garnet

Hardness = 6.5 to 7.5
6.5 6.5
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Calcite

Hardness = 3 (about the hardness of a penny)
6.5 6.5
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Titanite

Hardness = 5
6.5 6.5
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Benitoite

Hardness = 6.5
6.5 6.5
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Lapis Lazuli

Hardness = 6
6.5 6.5
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Tugtupite

Hardness = 6
6.4 6.4
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Scheelite

Hardness = 5
6.4 6.4
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Heliodor

Hardness = 7.5
6.4 6.4
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Malachite

Hardness = 3.5 to 4
6.4 6.4
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Hematite

Hardness = 6
6.4 6.4
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Corundum

Hardness = 9
6.4 6.4
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Smithsonite

Hardness = 5
6.4 6.4
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Moonstone

Hardness = 6
6.4 6.4
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talc

Hardness = 1
6.4 6.4
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Olivine - Peridot

Hardness = 6.5 to 7
6.4 6.4
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Kornerupine

Hardness = 6.5
6.4 6.4
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Enstatite

Hardness = 5.5
6.4 6.4
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Quartz

Hardness = 7
6.4 6.4
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Silver

Hardness = 2.5
6.4 6.4
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Hauyne

Hardness = 6
6.4 6.4
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Petalite

Hardness = 6
6.4 6.4
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Epidote

Hardness = 6.5
6.4 6.4
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Topaz

Hardness = 8
6.4 6.4
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Labradorite

Hardness = 6 to 6.5
6.4 6.4
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Pyrite

Hardness = 6
6.4 6.4
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Agate

Hardness = 7
6.4 6.4
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Fire Agate

Hardness = 7
6.4 6.4
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Tourmaline

Hardness = 7 to 7.5
6.4 6.4
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Phenakite

Hardness = 7.5
6.4 6.4
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Diamond

Hardness = 10
6.4 6.4
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Chrysocolla

Hardness = 2 to 4
6.4 6.4
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Coral

Hardness = 3
6.4 6.4
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Andalusite

Hardness = 7.5
6.4 6.4
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Fluorite

Hardness = 4
6.3 6.3
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Feldspar

Hardness = 6
6.3 6.3
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Microcline

Hardness = 6
6.3 6.3
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Danburite

Hardness = 7
6.3 6.3
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Sinhalite

Hardness = 6.5
6.3 6.3
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Sapphire

Hardness = 9
6.3 6.3
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Kyanite

Hardness = 5 and 7 (different hardness on different axes)
6.3 6.3
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Gold

Hardness = 2.5
6.3 6.3
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Chrysoprase

Hardness = 7
6.3 6.3
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Amethyst

Hardness = 7
6.3 6.3
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Rhodochrosite

Hardness = 4
6.3 6.3
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Apatite

Hardness = 5
6.3 6.3
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Serpentine

Hardness = 5
6.3 6.3
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Prehnite

Hardness = 6
6.3 6.3
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Pearl

Hardness = 3
6.3 6.3
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Iolite

Hardness = 7
6.3 6.3
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Sphalerite

Hardness = 3.5
6.3 6.3
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Nephrite

Hardness = 5 to 6
6.3 6.3
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Jasper

Hardness = 7
6.3 6.3
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Hypersthene

Hardness = 5.5
6.3 6.3
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Opal

Hardness = 5 to 6
6.3 6.3
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Brazilianite

Hardness = 5.5
6.3 6.3
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Bloodstone

Hardness = 7
6.3 6.3
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Sodalite

Hardness = 5.5 to 6
6.3 6.3
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Gypsum

Hardness = 2 to 2.5 (roughly the hardness of a fingernail)
6.3 6.3
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Taaffeite

Hardness = 8
6.3 6.3
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Dioptase

Hardness = 5
6.3 6.3
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Carnelian

Hardness = 7
6.3 6.3
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Jadeite

Hardness = 6.5 to 7 (similar to a steel file)
6.3 6.3
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Scapolite

Hardness = 6
6.3 6.3
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Calcedony

Hardness = 7
6.3 6.3
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Zoisite

Hardness = 6.5
6.3 6.3
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Shell

Hardness = 2.5
6.3 6.3
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Citrine

Hardness = 7
6.2 6.2
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Ruby

Hardness = 9
6.2 6.2
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Emerald

Hardness = 7.5
6.2 6.2
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Agate

Hardness = 7
6.2 6.2
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Zircon

Hardness = 7 to 7.5
6.2 6.2
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Tektite - Moldavite

Hardness = 5.5 (similar to window glass)
6.2 6.2
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Onyx

Hardness = 7
6.2 6.2
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Sillmanite

Hardness = 7.5
6.2 6.2
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Beryl

Hardness = 7.5 to 8
6.2 6.2
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Chrysoberyl

Hardness = 8.5
6.1 6.1
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Amber

Hardness = 2 to 2.5
6.1 6.1
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Sphene

Hardness = 5
6.1 6.1
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Ivory

Hardness = 2.5
6.1 6.1
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Obsidian

Hardness = 5 to 5.5
6.1 6.1
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Azurite

Hardness = 3.5
6.1 6.1
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Datolite

Hardness = 5
6.1 6.1
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Aquamarine

Hardness = 7.5
5.9 5.9
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