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 2281-2340 of 5,084 specimens
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Koechlinite
Koenenite
Hardness: 1.5
Kogarkoite
Hardness: 3.5
Kojonenite
Kokchetavite
Kokinosite
Hardness: 1.5
Koksharovite
Hardness: 4.5
Koktaite
Kolarite
Kolbeckite
Hardness: 3 - 5
Kolfanite
Hardness: 2.5
Kolicite
Hardness: 4.5
Kolitschite
Hardness: 4
Kollerite
Kolovratite
Hardness: 2 - 3
Kolskyite
Hardness: 3
Kolwezite
Hardness: 4
Kolymite
Hardness: 4
Komarovite
Hardness: 1 - 2
Kombatite
Hardness: 2 - 3
Komkovite
Hardness: 3 - 4
Konderite
Hardness: 5.5
Koninckite
Hardness: 3.5 - 4
Kononovite
Hardness: 3
Konyaite
Hardness: 2.5
Koragoite
Hardness: 4 - 5
Koritnigite
Hardness: 2
Kornelite
Kornerupine
Hardness: 7
Korobitsynite
Hardness: 5
Korshunovskite
Hardness: 2
Koryakite
Korzhinskite
Kosmochlor
Hardness: 6
Kosnarite
Hardness: 4.5
Kostovite
Hardness: 2 - 2.5
Kostylevite
Hardness: 5
Kotoite
Hardness: 6.5
Kottenheimite
Hardness: 2 - 2.5
Köttigite
Hardness: 2.5 - 3
Kotulskite
Hardness: 4 - 4.5
Koutekite
Hardness: 3.5
Kovdorskite
Hardness: 4
Kozoite-(la)
Kozoite-(nd)
Kozyrevskite
Hardness: 3.5
Kraisslite
Hardness: 3 - 4
Krasheninnikovite
Hardness: 2.5 - 3
Krásnoite
Krasnoshteinite
Krasnovite
Hardness: 2
Kratochvílite
Krausite
Hardness: 2.5
Krauskopfite
Hardness: 4
Krautite
Hardness: 3 - 4
Kravtsovite
Kreiterite
Kremersite
Krennerite
Hardness: 2 - 3
Krettnichite
Hardness: 4.5
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