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 241-300 of 5,084 specimens
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Argentopentlandite
Hardness: 3.5
Argentopyrite
Hardness: 3.5 - 4
Argentotennantite-(zn)
Hardness: 3.5
Argentotetrahedrite-(fe)
Argentotetrahedrite-(hg)
Argentotetrahedrite-(zn)
Argesite
Argutite
Hardness: 6 - 7
Argyrodite
Hardness: 2.5 - 3
Arhbarite
Ariegilatite
Arisite-(ce)
Arisite-(la)
Hardness: 3 - 3.5
Aristarainite
Hardness: 3.5
Armalcolite
Hardness: 5
Armangite
Hardness: 4
Armbrusterite
Hardness: 3.5
Armellinoite-(ce)
Armenite
Hardness: 7.5
Armstrongite
Hardness: 4.5
Arrheniusite-(ce)
Arrojadite-(bafe)
Arrojadite-(bana)
Hardness: 4 - 5
Arrojadite-(kfe)
Hardness: 5
Arrojadite-(kna)
Arrojadite-(pbfe)
Arrojadite-(srfe)
Arsenatrotitanite
Hardness: 5.5
Arsenbrackebuschite
Hardness: 4.5
Arsendescloizite
Hardness: 4
Arseniopleite
Hardness: 3.5
Arseniosiderite
Hardness: 4.5
Arsenmarcobaldiite
Arsenmedaite
Arsenoclasite
Hardness: 5 - 6
Arsenocrandallite
Hardness: 5.5
Arsenoflorencite-(ce)
Hardness: 3.5
Arsenoflorencite-(la)
Hardness: 3.5
Arsenogorceixite
Hardness: 4
Arsenogoyazite
Hardness: 4
Arsenohauchecornite
Hardness: 5.5
Arsenohopeite
Hardness: 3
Arsenolamprite
Hardness: 2
Arsenolite
Hardness: 1.5
Arsenopalladinite
Hardness: 4
Arsenotučekite
Arsenovanmeersscheite
Arsenowagnerite
Hardness: 5
Arsenquatrandorite
Arsentsumebite
Hardness: 4 - 5
Arsenudinaite
Arsenuranospathite
Hardness: 2
Arsenuranylite
Arsiccioite
Hardness: 2 - 2.5
Arsmirandite
Arthurite
Hardness: 3 - 4
Artinite
Hardness: 2.5
Artroeite
Hardness: 2.5
Artsmithite
Arupite
Hardness: 1.5 - 2
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