Kekerasan Permata

Dalam gemology, kekerasan batu permata diukur pada skala yang dikenal sebagai skala Mohs, yang memberikan mineral nilai antara 1 (softest) dan 10 (hardest). Skala ini dirancang oleh ahli mineral Jerman, Frederick Mohs, pada tahun 1822. Ini mendefinisikan kekerasan dalam hal tahan gores, di mana mineral hardest akan menggores softest, namun tidak sebaliknya. 

Gems dengan rating kekerasan 1-2 dianggap softest, sedangkan di kisaran 3-5 adalah medium hardest/keras. Gems lebih dari 6 dianggap hardest/keras dan dengan demikian cocok untuk perhiasan.

	Diamond	10
	Ruby	9
	Star Ruby	9
	Sapphire	9
	Star Sapphire	9
	Alexandrite	8.5
	Alexandrite Cat's Eye	8.5
	Chrysoberyl	8.5
	Chrysoberyl Cat's Eye	8.5
	Vanadium Chrysoberyl	8.5
	Taaffeite	8-8.5
	Spinel	8
	Topaz	8
	Imperial Topaz	8
	Pezzotaite	8
	Emerald	7.5-8
	Enstatite	7.5-8
	Aquamarine	7.5-8
	Morganite	7.5-8
	Goshenite Beryl	7.5-8
	Golden Beryl	7.5-8
	Painite	7.5-8
	Phenakite	7.5-8
	Red Beryl (Bixbite)	7.5-8
	Andalusite	7.5
	Euclase	7.5
	Hambergite	7.5
	Dumortierite	7-8.5
	Almandine Garnet	7-7.5
	Danburite	7-7.5
	Iolite	7-7.5
	Pyrope Garnet	7-7.5
	Spessartite Garnet	7-7.5
	Rhodolite Garnet	7-7.5
	Color-Change Garnet	7-7.5
	Chrome Tourmaline	7-7.5
	Malaia Garnet	7-7.5
	Paraiba Tourmaline	7-7.5
	Rubellite Tourmaline	7-7.5
	Tourmaline	7-7.5
	Uvarovite Garnet	7-7.5
	Amethyst	7
	Aventurine	7
	Ametrine	7
	Citrine	7
	Gem Silica	7
	Kornerupine	7
	Rock Crystal	7
	Rose Quartz	7
	Smoky Quartz	7
	Jeremejevite	6.5-7.5
	Sillimanite	6.5-7.5
	Zircon	6.5-7.5
	Agate	6.5-7
	Axinite	6.5-7
	Bloodstone	6.5-7
	Carnelian	6.5-7
	Chalcedony	6.5-7
	Chrome Chalcedony	6.5-7
	Chrysopase	6.5-7
	Demantoid Garnet	6.5-7
	Diaspore	6.5-7
	Grossular Garnet	6.5-7
	Hessonite Garnet	6.5-7
	Hiddenite	6.5-7
	Jadeite Jade	6.5-7
	Jasper	6.5-7
	Mali Garnet	6.5-7
	Kunzite	6.5-7
	Leuco Garnet	6.5-7
	Onyx	6.5-7
	Peridot	6.5-7
	Serendibite	6.5-7
	Sinhalite	6.5-7
	Spodumene	6.5-7
	Tanzanite	6.5-7
	Tsavorite Garnet	6.5-7
	Idocrase (Vesuvianite)	6.5
	Cassiterite	6-7
	Epidote	6-7
	Maw-Sit-Sit	6-7
	Unakite	6-7
	Amazonite	6-6.5
	Andesine	6-6.5
	Benitoite	6-6.5
	Labradorite	6-6.5
	Moonstone	6-6.5
	Nephrite Jade	6-6.5
	Orthoclase	6-6.5
	Petalite	6-6.5
	Prehnite	6-6.5
	Scheelite	6-6.5
	Sugilite	6-6.5
	Sunstone	6-6.5
	Zoisite	6-6.5
	Amblygonite	6
	Clinohumite	6
	Hematite	5.5-6.5
	Mexican Fire Opal	5.5-6.5
	Opal	5.5-6.5
	Rhodonite	5.5-6.5
	Actinolite	5.5-6
	Azurite	5.5-6
	Hackmanite	5.5-6
	Hauyne	5.5-6
	Scapolite	5.5-6
	Sodalite	5.5-6
	Moldavite	5.5
	Diopside	5-6
	Chrome Diopside	5-6
	Lapis Lazuli	5-6
	Poudretteite	5-6
	Turquoise	5-6
	Brazilianite	5.5
	Datolite	5-5.5
	Eudialyte	5-5.5
	Obsidian	5-5.5
	Sphene (Titanite)	5-5.5
	Apatite	5
	Cat's Eye Apatite	5
	Dioptase	5
	Hemimorphite	5
	Smithsonite	5
	Charoite	4.5-5
	Gaspeite	4.5-5
	Larimar	4.5-5
	Kyanite	4-7
	Bastnasite	4-5
	Carletonite	4-4.5
	Ammolite (Korite)	4
	Fluorite	4
	Rhodochrosite	4
	Aragonite	3.5-4
	Azurite	3.5-4
	Cuprite	3.5-4
	Malachite	3.5-4
	Sphalerite	3.5-4
	Coral	3-4
	Celestine	3-3.5
	Cerussite	3-3.5
	Howlite	3-3.5
	Calcite	3
	Pearl	2.5-4.5
	Jet	2.5-4
	Lepidolite	2.5-3
	Chrysocolla	2-4
	Amber	2-2.5
	Cinnabar	2-2.5
	Ulexite	2-2.5