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 2161-2220 of 5,084 specimens
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Karpenkoite
Karpinskite
Hardness: 2.5 - 3
Karpovite
Hardness: 2
Karupmøllerite-ca
Hardness: 5
Kasatkinite
Kashinite
Hardness: 7.5
Kaskasite
Hardness: 1
Kasolite
Hardness: 4 - 5
Kassite
Hardness: 5
Kastningite
Hardness: 1 - 2
Katayamalite
Katerinopoulosite
Hardness: 2.5
Katiarsite
Katoite
Hardness: 5 - 6
Katophorite
Hardness: 5
Katoptrite
Hardness: 5.5
Katsarosite
Kawazulite
Hardness: 1.5
Kayrobertsonite
Kazakhstanite
Hardness: 2.5
Kazakovite
Hardness: 4
Kazanskyite
Hardness: 3
Keckite
Hardness: 4.5
Kegelite
Kegginite
Hardness: 2
Keilite
Keithconnite
Hardness: 5
Keiviite-(y)
Hardness: 4 - 5
Keiviite-(yb)
Hardness: 4 - 5
Keldyshite
Hardness: 3.5 - 4.5
Kellyite
Hardness: 2.5
Kelyanite
Hardness: 3 - 3.5
Kemmlitzite
Hardness: 5.5
Kempite
Hardness: 3.5
Kenhsuite
Hardness: 2 - 3
Kenngottite
Hardness: 4 - 5
Kenoargentotennantite-(fe)
Kenoargentotetrahedrite-(fe)
Kenoargentotetrahedrite-(zn)
Kenoplumbomicrolite
Hardness: 6
Kenotobermorite
Kentbrooksite
Hardness: 5 - 6
Kentrolite
Hardness: 5
Kenyaite
Keplerite
Kerimasite
Hardness: 7
Kermesite
Hardness: 1 - 1.5
Kernite
Hardness: 2.5
Kernowite
Kesebolite-(ce)
Hardness: 5 - 6
Kesterite
Hardness: 4.5
Kettnerite
Keutschite
Keyite
Hardness: 3.5 - 4
Keystoneite
Khademite
Khaidarkanite
Hardness: 2.5
Khamrabaevite
Hardness: 9 - 9.5
Khanneshite
Hardness: 3 - 4
Kharaelakhite
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