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 2341-2400 of 5,084 specimens
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Kribergite
Krieselite
Hardness: 5.5 - 6.5
Krinovite
Hardness: 5.5 - 7
Kristiansenite
Hardness: 5.5 - 6
Krivovichevite
Hardness: 3
Kröhnkite
Hardness: 2.5 - 3
Krotite
Kroupaite
Hardness: 2
Kruijenite
Krupičkaite
Krupkaite
Hardness: 3.5 - 4
Krut'aite
Hardness: 4
Krutovite
Hardness: 5.5
Kryachkoite
Kryzhanovskite
Hardness: 3.5 - 4
Ktenasite
Hardness: 2 - 2.5
Kuannersuite-(ce)
Hardness: 4.5 - 5.5
Kudriavite
Kudryavtsevaite
Hardness: 6
Kufahrite
Kukharenkoite
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Kukharenkoite-(ce)
Hardness: 4.5
Kukharenkoite-(la)
Hardness: 4
Kukisvumite
Hardness: 5.5 - 6
Kuksite
Hardness: 5
Kulanite
Hardness: 4
Kuliginite
Kuliokite-(y)
Hardness: 4 - 5
Kulkeite
Hardness: 2
Kullerudite
Hardness: 5.5 - 6.5
Kumdykolite
Kummerite
Kumtyubeite
Hardness: 5 - 6
Kunatite
Kupčíkite
Hardness: 3
Kupletskite
Hardness: 4
Kupletskite-(cs)
Hardness: 4
Kuramite
Hardness: 5
Kuranakhite
Hardness: 4 - 5
Kuratite
Kurchatovite
Hardness: 4.5
Kurgantaite
Hardness: 6 - 6.5
Kurilite
Hardness: 3
Kurnakovite
Hardness: 2.5 - 3
Kurumsakite
Kusachiite
Hardness: 4.5
Kushiroite
Kutinaite
Hardness: 4.5
Kutnohorite
Hardness: 3.5 - 4
Kuvaevite
Kuzelite
Hardness: 1.5 - 2
Kuzmenkoite-mn
Hardness: 5
Kuzmenkoite-zn
Hardness: 5
Kuzminite
Hardness: 1.5
Kuznetsovite
Hardness: 2.5 - 3
Kvanefjeldite
Hardness: 5.5 - 6
Kyanoxalite
Kyawthuite
Hardness: 5.5
Kyrgyzstanite
Hardness: 2 - 2.5
Kyzylkumite
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