Minerals
Minerals are naturally occurring inorganic substances with a specific chemical composition and crystalline structure. They are the building blocks of rocks and are classified by their chemical composition and crystal system.
Showing 2221-2280 of 5,084 specimens
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Khatyrkite
Hardness: 5
Khesinite
Hardness: 6
Khibinskite
Hardness: 4.5 - 5.5
Khinite
Hardness: 3
Khmaralite
Hardness: 7
Khomyakovite
Hardness: 5 - 6
Khorixasite
Khrenovite
Khristovite-(ce)
Hardness: 5
Khurayyimite
Khvorovite
Hardness: 5 - 5.5
Kiddcreekite
Hardness: 4
Kidwellite
Hardness: 3
Kieftite
Hardness: 5 - 5.5
Kieserite
Hardness: 3.5
Kihlmanite-(ce)
Hardness: 3
Kilchoanite
Killalaite
Kimrobinsonite
Hardness: 2.5
Kimuraite-(y)
Hardness: 2.5
Kimzeyite
Hardness: 7
Kingite
Kingsgateite
Kingsmountite
Hardness: 2.5
Kingstonite
Kinichilite
Hardness: 2
Kinoite
Hardness: 2.5
Kinoshitalite
Hardness: 2.5 - 3
Kintoreite
Hardness: 4
Kipushite
Hardness: 4
Kircherite
Hardness: 5.5
Kirchhoffite
Hardness: 6 - 6.5
Kirkiite
Hardness: 3.5
Kirschsteinite
Hardness: 5.5
Kishonite
Kitagohaite
Hardness: 3.5
Kitkaite
Hardness: 3.5
Kittatinnyite
Hardness: 4
Kladnoite
Klajite
Hardness: 2 - 3
Klaprothite
Hardness: 2.5
Klebelsbergite
Hardness: 3.5 - 4
Kleberite
Kleemanite
Kleinite
Hardness: 3.5
Klöchite
Klockmannite
Hardness: 2 - 2.5
Klyuchevskite
Hardness: 3.5
Knasibfite
Knebelite
Knorringite
Hardness: 6 - 7
Koashvite
Hardness: 6
Kobeite-(y)
Hardness: 5.5
Kobellite
Hardness: 2.5 - 3
Kobokoboite
Hardness: 2
Kobyashevite
Hardness: 2.5
Kochite
Hardness: 5
Kochkarite
Hardness: 2 - 2.5
Kochsándorite
Hardness: 2 - 2.5
Kodamaite
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