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 61-120 of 5,084 specimens
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Akopovaite
Akrochordite
Hardness: 3.5
Aksaite
Hardness: 2.5
Aktashite
Hardness: 3.5
Alabandite
Hardness: 3.5 - 4
Alacránite
Hardness: 1.5
Alamosite
Hardness: 4.5
Alarsite
Hardness: 5 - 5.5
Albertiniite
Albrechtschraufite
Hardness: 2 - 3
Alburnite
Hardness: 4
Alcantarillaite
Alcaparrosaite
Hardness: 4
Aldermanite
Hardness: 2
Aldridgeite
Hardness: 3
Aleksandrovite
Hardness: 4 - 4.5
Aleksite
Hardness: 2.5
Aleutite
Alexkhomyakovite
Hardness: 3
Alexkuznetsovite-(ce)
Alexkuznetsovite-(la)
Alflarsenite
Hardness: 4
Alforsite
Hardness: 5
Alfredopetrovite
Hardness: 2.5
Alfredstelznerite
Algodonite
Hardness: 4
Alicewilsonite-(yce)
Aliettite
Hardness: 1 - 2
Allabogdanite
Hardness: 5 - 6
Allactite
Hardness: 4.5
Allanite
Hardness: 5.5 - 6
Allanite-(ce)
Hardness: 5.5 - 6
Allanite-(la)
Hardness: 6
Allanite-(nd)
Allanite-(y)
Hardness: 5.5 - 6.5
Allanpringite
Hardness: 3
Allantoin
Allargentum
Hardness: 3.5
Alleghanyite
Hardness: 5.5
Allendeite
Allochalcoselite
Hardness: 3 - 4
Alloclasite
Hardness: 5
Allophane
Hardness: 3
Alloriite
Hardness: 5
Alluaivite
Hardness: 5 - 6
Alluaudite
Hardness: 5.5 - 6
Almarudite
Hardness: 6
Almeidaite
Alnaperbøeite-(ce)
Hardness: 6 - 7
Alpeite
Hardness: 5.5 - 6
Alpersite
Alsakharovite
Alsakharovite-zn
Hardness: 5
Alstonite
Hardness: 4 - 4.5
Altaite
Hardness: 2 - 3
Alterite
Althausite
Hardness: 3.5 - 4
Althupite
Hardness: 3.5 - 4
Altisite
Hardness: 6
Alum
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