All Gemstones
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Achroite
Hardness: 7.0
Actinolite
Hardness: 5.5
Adamite
Hardness: 3.5
Adularia
Hardness: 6.0
Aegirine
Hardness: 6.0
Afghanite
Hardness: 5.5
Agalmatolite
Hardness: 1.0
Agate
Hardness: 6.5
Agate Opal
Hardness: 5.5
Alabaster
Hardness: 2.0
Albite
Hardness: 6.0
Alexandrite
Hardness: 8.5
Allanite
Hardness: 0.0
Almandine
Hardness: 7.0
Almandine-Pyrope
Hardness: 7.5
Amazonite
Hardness: 6.0
Amber
Hardness: 2.0
Amblygonite
Hardness: 6.0
Amethyst
Hardness: 7.0
Ametrine
Hardness: 7.0
Ammolite
Hardness: 4.0
Analcime (Analcite)
Hardness: 5.0
Anatase
Hardness: 5.5
Andalusite
Hardness: 7.5
Andesine
Hardness: 6.0
Andradite
Hardness: 6.5
Anglesite
Hardness: 3.0
Anhydrite
Hardness: 3.5
Anorthite
Hardness: 6.0
Anorthoclase
Hardness: 6.0
Anthophyllite
Hardness: 5.5
Antigorite
Hardness: 5.0
Anyolite
Hardness: 6.0
Apatite
Hardness: 5.0
Apophyllite Group
Hardness: 4.5
Aquamarine
Hardness: 7.5
Aragonite
Hardness: 3.5
Astrophyllite
Hardness: 3.0
Augelite
Hardness: 4.5
Augite
Hardness: 5.5
Aventurine
Hardness: 7.0
Axinite
Hardness: 6.5
Azurite
Hardness: 3.5
Azurmalachite
Hardness: 3.5
Baddeleyite
Hardness: 6.5
Baryte (Barite)
Hardness: 3.0
Bastnäsite
Hardness: 4.0
Benitoite
Hardness: 6.0
Bertrandite
Hardness: 6.0
Beryl
Hardness: 7.5
Beryllonite
Hardness: 5.5
Bikolite
Hardness: 5.5
Binghamite
Hardness: 6.5
Black Opal
Hardness: 6.0
Bloodstone (Heliotrope)
Hardness: 6.5
Blue Beryl (Maxixe)
Hardness: 7.5
Blue John
Hardness: 4.0
Boleite
Hardness: 3.0
Boracite
Hardness: 7.0
Boulder Opal
Hardness: 5.0
Bowenite
Hardness: 5.0
Brazilianite
Hardness: 5.5
Bronzite
Hardness: 5.5
Brookite
Hardness: 5.5
Brucite
Hardness: 2.5
Bustamite
Hardness: 5.5
Bytownite
Hardness: 6.0
Calcite
Hardness: 3.0
Calcite Satin Spar
Hardness: 3.0
Caledonite
Hardness: 2.5
Californite
Hardness: 6.5
Cancrinite
Hardness: 5.0
Carletonite
Hardness: 4.0
Carnelian
Hardness: 6.5
Cassiterite
Hardness: 6.0
Catapleiite
Hardness: 5.0
Celestine
Hardness: 3.0
Cerussite
Hardness: 3.0
Ceylonite
Hardness: 7.5
Chabazite
Hardness: 4.5
Chalcedony
Hardness: 6.5
Chalcopyrite
Hardness: 3.5
Chambersite
Hardness: 7.0
Charoite
Hardness: 5.0
Chiastolite
Hardness: 5.0
Childrenite
Hardness: 4.5
Chlorapatite
Hardness: 5.0
Chlorastrolite
Hardness: 5.0
Chondrodite
Hardness: 6.0
Chrome-Chalcedony
Hardness: 6.5
Chrome-Diopside
Hardness: 5.0
Chrome Pyrope
Hardness: 7.0
Chrome-Tourmaline
Hardness: 7.0
Chrome-Tremolite
Hardness: 5.0
Chrysoberyl
Hardness: 8.5
Chrysocolla
Hardness: 2.0
Chrysoprase
Hardness: 6.5
Chrysotile
Hardness: 2.5
Cinnabar
Hardness: 2.0
Citrine
Hardness: 7.0
Clinochlore
Hardness: 2.0
Clinohedrite
Hardness: 5.5
Clinohumite
Hardness: 6.0
Clinozoisite
Hardness: 6.0
Cobaltite
Hardness: 5.5
Colemanite
Hardness: 4.5
Common Opal
Hardness: 5.5
Copal
Hardness: 2.0
Coral
Hardness: 3.0
Cordierite (Iolite)
Hardness: 7.0
Corundum
Hardness: 9.0
Covellite
Hardness: 1.5
Creedite
Hardness: 4.5
Cristinite
Hardness: 6.5
Crocoite
Hardness: 2.5
Cryolite
Hardness: 2.5
Crystal Opal
Hardness: 5.5
Cubic Zirconia
Hardness: 8.5
Cuprite
Hardness: 3.5
Cymophane
Hardness: 8.5
Cyprine (of Berzelius)
Hardness: 6.0
Dallasite
Hardness: 6.5
Danburite
Hardness: 7.0
Datolite
Hardness: 5.0
Demantoid
Hardness: 6.5
Diamond
Hardness: 10.0
Diaspore
Hardness: 6.5
Diopside
Hardness: 5.0
Dioptase
Hardness: 5.0
Dolomite
Hardness: 3.5
Dravite
Hardness: 7.0
Dumortierite
Hardness: 7.0
Ekanite
Hardness: 6.0
Elaeolite
Hardness: 5.5
Elbaite
Hardness: 7.0
Emerald
Hardness: 7.5
Enstatite
Hardness: 5.5
Eosphorite
Hardness: 5.0
Epidote
Hardness: 6.0
Esperite
Hardness: 5.0
Ettringite
Hardness: 2.0
Euclase
Hardness: 7.5
Eudialyte
Hardness: 5.0
Falcon's Eye
Hardness: 7.0
Faustite
Hardness: 4.5
Fayalite
Hardness: 6.5
Feldspar
Hardness: 6.0
Ferro-axinite (Axinite-(Fe))
Hardness: 6.5
Fibrolite
Hardness: 6.0
Fire Agate
Hardness: 6.5
Fire Opal
Hardness: 6.0
Fluorapatite
Hardness: 5.0
Fluor-buergerite
Hardness: 7.0
Fluorite
Hardness: 4.0
Fluor-uvite-Uvite Series
Hardness: 7.5
Foitite
Hardness: 7.0
Forsterite
Hardness: 6.5
Franklinite
Hardness: 6.0
Friedelite
Hardness: 4.0
Fuchsite
Hardness: 2.5
Gadolinium Gallium Garnet (GGG)
Hardness: 6.5
Gahnite
Hardness: 7.5
Gahnospinel
Hardness: 7.5
Garnet Group
Hardness: 6.5
Gaspéite
Hardness: 4.5
Gedrite
Hardness: 5.5
Girasol
Hardness: 5.5
Glass
Hardness: 4.0
Goethite
Hardness: 5.0
Goldstone
Hardness: 6.0
Goshenite
Hardness: 7.5
Grandidierite
Hardness: 7.5
Grossular
Hardness: 7.0
Gypsum
Hardness: 2.0
Hackmanite
Hardness: 5.5
Hambergite
Hardness: 7.5
Hardystonite
Hardness: 3.0
Harlequin Opal
Hardness: 5.5
Haüyne
Hardness: 5.5
Heliodor (Golden Beryl)
Hardness: 7.5
Hematite
Hardness: 6.0
Hemimorphite
Hardness: 5.0
Hercynite
Hardness: 7.5
Herderite
Hardness: 5.0
Hessonite
Hardness: 7.0
Hexagonite
Hardness: 5.0
Hibonite
Hardness: 7.5
Hibschite
Hardness: 6.0
Hiddenite
Hardness: 6.0
Hodgkinsonite
Hardness: 4.5
Holmquistite
Hardness: 5.0
Honey Opal
Hardness: 5.5
Howlite
Hardness: 3.0
Hübnerite
Hardness: 4.0
Humite
Hardness: 6.0
Hureaulite
Hardness: 3.5
Hurlbutite
Hardness: 6.0
Hyacinth
Hardness: 6.5
Hyalite
Hardness: 5.5
Hydrogrossular
Hardness: 7.5
Hydrophane
Hardness: 5.5
Hypersthene
Hardness: 5.0
Imperial Topaz (A variety of topaz of orange, pinkish colours.)
Hardness: 8.0
Inderite
Hardness: 2.5
Indicolite (Blue Tourmaline)
Hardness: 7.0
Iris Agate
Hardness: 6.5
Ivory
Hardness: 2.0
Jacobsite
Hardness: 5.5
Jade
Hardness: 6.0
Jadeite
Hardness: 6.5
Jasper
Hardness: 6.5
Jeremejevite
Hardness: 6.5
Jet
Hardness: 2.5
Johachidolite
Hardness: 7.5
Kämmererite
Hardness: 2.0
Kornerupine
Hardness: 6.5
Kunzite
Hardness: 6.0
Kyanite (Cyprine)
Hardness: 4.0
Labradorite
Hardness: 6.0
Lapis lazuli
Hardness: 5.5
Larimar
Hardness: 5.0
Larvikite
Hardness: 6.0
Lazulite
Hardness: 5.5
Lazurite
Hardness: 5.5
Legrandite
Hardness: 4.5
Lepidolite
Hardness: 2.5
Leucite
Hardness: 5.5
Libyan Desert Glass
Hardness: 0.0
Liddicoatite
Hardness: 7.5
Linarite
Hardness: 2.5
Lizardite
Hardness: 2.5
Londonite
Hardness: 8.0
Ludlamite
Hardness: 3.0
Magnesio-axinite (Axinite-(Mg))
Hardness: 6.5
Magnesite
Hardness: 3.5
Magnetite
Hardness: 5.5
Malachite
Hardness: 3.5
Manganaxinite (Axinite-(Mn))
Hardness: 6.5
Manganotantalite
Hardness: 5.5
Marcasite
Hardness: 6.0
Marialite
Hardness: 5.5
Matrix Opal
Hardness: 5.5
Maw Sit Sit
Hardness: 6.0
Meionite
Hardness: 5.0
Melanite
Hardness: 6.5
Mellite
Hardness: 2.0
Microcline
Hardness: 6.0
Microlite
Hardness: 5.0
Milarite
Hardness: 5.5
Milk Opal (Porcelain Opal)
Hardness: 5.5
Mimetite
Hardness: 3.5
Mohawkite
Hardness: 3.0
Moissanite
Hardness: 9.0
Moldavite
Hardness: 5.5
Monazite
Hardness: 5.0
Montebrasite
Hardness: 5.5
Moonstone
Hardness: 6.0
Morganite
Hardness: 7.5
Morion
Hardness: 7.0
Moroxite
Hardness: 5.0
Moss Agate
Hardness: 6.5
Moss Opal
Hardness: 5.5
Mother of Pearl
Hardness: 2.5
Muscovite
Hardness: 2.0
Musgravite
Hardness: 0.0
Nano-Polycrystalline Diamond
Hardness: 0.0
Narsarsukite
Hardness: 6.0
Natrolite
Hardness: 5.0
Nepheline
Hardness: 5.0
Nephrite
Hardness: 6.0
Neptunite
Hardness: 5.0
Nifontovite
Hardness: 3.5
Norbergite
Hardness: 6.0
Nosean
Hardness: 5.5
Nuummite
Hardness: 5.5
Obsidian
Hardness: 5.0
Odontolite
Hardness: 5.0
Oligoclase
Hardness: 6.0
Omphacite
Hardness: 5.0
Onyx
Hardness: 6.5
Opal
Hardness: 5.0
Orthoclase
Hardness: 6.0
Padparadscha
Hardness: 9.0
Painite
Hardness: 7.5
Papagoite
Hardness: 5.0
Paraíba Tourmaline (Cuprian Elbaite)
Hardness: 7.0
Pargasite
Hardness: 5.0
Parisite
Hardness: 4.5
Pearl
Hardness: 2.5
Pectolite
Hardness: 4.5
Periclase
Hardness: 5.5
Peridot (Olivine)
Hardness: 6.5
Petalite
Hardness: 6.0
Petrified Wood (Fossilized Wood)
Hardness: 6.5
Pezzottaite
Hardness: 7.5
Phenakite
Hardness: 7.5
Phosgenite
Hardness: 2.0
Phosphophyllite
Hardness: 3.0
Phosphosiderite
Hardness: 3.5
Pink Opal
Hardness: 6.0
Pleonaste
Hardness: 8.0
Pollucite
Hardness: 6.5
Poudretteite
Hardness: 5.0
Povondraite
Hardness: 7.0
Powellite
Hardness: 3.5
Prase
Hardness: 7.0
Prase Opal
Hardness: 5.0
Prasiolite
Hardness: 7.0
Precious Opal
Hardness: 5.0
Prehnite
Hardness: 6.0
Proustite
Hardness: 2.5
Pumpellyite Subgroup
Hardness: 5.0
Purpurite
Hardness: 4.0
Pyrargyrite
Hardness: 2.5
Pyrite
Hardness: 6.0
Pyromorphite
Hardness: 3.5
Pyrope
Hardness: 7.0
Pyrope-Spessartine
Hardness: 7.0
Pyrophyllite
Hardness: 1.0
Pyroxmangite
Hardness: 5.0
Quartz
Hardness: 7.0
Realgar
Hardness: 1.5
Red Beryl (Bixbite)
Hardness: 7.5
Rhodizite
Hardness: 8.0
Rhodochrosite (Manganesespar)
Hardness: 4.0
Rhodolite
Hardness: 7.0
Rhodonite
Hardness: 5.5
Riesling Beryl
Hardness: 7.5
Rinkite-(Ce)
Hardness: 5.0
Rock Crystal
Hardness: 7.0
Romanèchite
Hardness: 5.0
Rose Quartz
Hardness: 7.0
Rossmanite
Hardness: 7.0
Rubellite
Hardness: 7.0
Ruby
Hardness: 9.0
Rutilated Quartz
Hardness: 7.0
Rutile
Hardness: 6.0
Sanidine
Hardness: 6.0
Sapphire
Hardness: 9.0
Sapphirine
Hardness: 7.5
Sarcopside
Hardness: 4.0
Sard
Hardness: 6.5
Sardonyx
Hardness: 6.5
Satin Spar
Hardness: 2.0
Scapolite
Hardness: 5.5
Scheelite
Hardness: 4.5
Schorl
Hardness: 7.0
Schorlomite
Hardness: 7.0
Schultenite
Hardness: 2.5
Scolecite
Hardness: 5.0
Scorzalite
Hardness: 5.5
Selenite
Hardness: 2.0
Sellaite
Hardness: 5.0
Serandite
Hardness: 5.0
Seraphinite
Hardness: 0.0
Serendibite
Hardness: 6.5
Serpentine
Hardness: 2.5
Shattuckite
Hardness: 3.5
Sheen Obsidian
Hardness: 5.0
Shortite
Hardness: 3.0
Siderite
Hardness: 3.5
Sillimanite
Hardness: 6.0
Simpsonite
Hardness: 7.0
Sinhalite
Hardness: 6.0
Smaragdite
Hardness: 5.5
Smithsonite
Hardness: 5.0
Smoky Quartz
Hardness: 7.0
Snowflake Obsidian
Hardness: 5.0
Sodalite
Hardness: 5.0
Sogdianite
Hardness: 7.0
Sonolite
Hardness: 5.5
Spessartine
Hardness: 7.0
Sphalerite
Hardness: 3.5
Spinel
Hardness: 8.0
Spodumene
Hardness: 6.0
Starlite
Hardness: 6.5
Star Ruby
Hardness: 9.0
Star Sapphire
Hardness: 9.0
Staurolite
Hardness: 7.0
Steatite
Hardness: 1.0
Stibiotantalite
Hardness: 5.5
Stichtite
Hardness: 1.5
Strontianite
Hardness: 3.5
Strontium Titanate
Hardness: 5.5
Sugilite
Hardness: 5.5
Sulphur
Hardness: 1.5
Sunstone (Aventurine feldspar)
Hardness: 6.0
Sussexite
Hardness: 3.0
Taaffeite (Magnesiotaaffeite)
Hardness: 8.0
Talc
Hardness: 1.0
Tantalite
Hardness: 6.0
Tanzanite
Hardness: 6.5
Tavorite
Hardness: 0.0
Tektite
Hardness: 5.5
Thaumasite
Hardness: 3.5
Thomsonite Subgroup
Hardness: 5.0
Thulite
Hardness: 6.0
Tiger's Eye
Hardness: 6.5
Tinzenite
Hardness: 6.5
Titanite (Sphene)
Hardness: 5.0
Topaz
Hardness: 8.0
Topazolite
Hardness: 6.5
Tortoiseshell
Hardness: 3.0
Tourmaline
Hardness: 7.0
Transvaal Jade
Hardness: 7.0
Tremolite
Hardness: 5.0
Triplite
Hardness: 5.0
Tsavorite
Hardness: 7.0
Tugtupite
Hardness: 5.5
Turquoise
Hardness: 5.0
Ulexite
Hardness: 2.0
Umbalite
Hardness: 7.0
Unakite
Hardness: 6.0
Uvarovite
Hardness: 7.5
Variscite
Hardness: 4.0
Verdelite
Hardness: 7.0
Verdite
Hardness: 3.0
Vesuvianite (Idocrase)
Hardness: 6.5
Villiaumite
Hardness: 2.0
Violane
Hardness: 5.0
Viridine
Hardness: 7.0
Vivianite
Hardness: 1.5
Wardite
Hardness: 4.5
Watermelon Tourmaline
Hardness: 7.0
Water Opal (Jelly Opal)
Hardness: 5.5
Wavellite
Hardness: 3.5
Wax Opal
Hardness: 5.5
Wernerite
Hardness: 5.0
White Opal
Hardness: 5.5
Whitlockite
Hardness: 5.0
Willemite
Hardness: 5.5
Williamsite
Hardness: 4.0
Witherite
Hardness: 3.0
Wood Opal
Hardness: 5.5
Wulfenite
Hardness: 3.0
Xenotime
Hardness: 4.0
Xonotlite
Hardness: 6.0
Yttrium Aluminium Garnet
Hardness: 8.0
Zektzerite
Hardness: 6.0
Zincite
Hardness: 4.0
Zircon
Hardness: 7.5
Zoisite
Hardness: 6.0