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 2101-2160 of 5,084 specimens
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Julgoldite-(mg)
Julienite
Jungite
Hardness: 1
Junitoite
Hardness: 4.5
Junoite
Hardness: 3.5 - 4
Juonniite
Hardness: 4 - 4.5
Jurbanite
Hardness: 2.5
Jusite
Kaatialaite
Kadyrelite
Hardness: 2.5 - 3
Kaersutite
Hardness: 5 - 6
Kahlenbergite
Kahlerite
Hardness: 2 - 2.5
Kainite
Hardness: 2.5 - 3
Kainosite
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Kainosite-(y)
Hardness: 5 - 6
Kainotropite
Kaitianite
Kalborsite
Hardness: 6
Kalgoorlieite
Kaliborite
Hardness: 4 - 4.5
Kalicinite
Hardness: 1 - 2
Kalifersite
Hardness: 2
Kalininite
Hardness: 5
Kalinite
Hardness: 2
Kaliochalcite
Hardness: 4
Kaliophilite
Hardness: 5.5 - 6
Kalistrontite
Hardness: 2
Kalithallite
Kalsilite
Hardness: 6
Kalungaite
Kamaishilite
Kamarizaite
Hardness: 3
Kambaldaite
Kamchatkite
Hardness: 3.5
Kamenevite
Kamiokite
Hardness: 4.5
Kamitugaite
Kamotoite-(y)
Kampelite
Hardness: 1
Kampfite
Hardness: 3
Kamphaugite-(y)
Hardness: 2 - 3
Kanemite
Hardness: 4
Kangite
Kaňkite
Hardness: 2 - 3
Kannanite
Hardness: 6
Kanoite
Hardness: 6
Kanonaite
Hardness: 6.5
Kanonerovite
Hardness: 2.5 - 3
Kapellasite
Kapitsaite-(y)
Hardness: 5.5
Kapundaite
Hardness: 3
Kapustinite
Hardness: 6
Karasugite
Karchevskyite
Hardness: 2
Karelianite
Hardness: 8 - 9
Karenwebberite
Karibibite
Karlite
Hardness: 5.5
Karnasurtite-(ce)
Hardness: 2
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