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 3901-3960 of 5,084 specimens
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Roscoelite
Hardness: 2.5
Rosemaryite
Hardness: 4 - 4.5
Rosenbergite
Hardness: 3 - 3.5
Rosenbuschite
Hardness: 5 - 6
Rosenhahnite
Hardness: 4.5 - 5
Roshchinite
Hardness: 2.5 - 3.5
Rosiaite
Hardness: 5.5
Rosickýite
Hardness: 2 - 3
Rosièresite
Hardness: 3 - 3.5
Rossiantonite
Rossite
Hardness: 2 - 3
Rößlerite
Hardness: 2 - 3
Rossmanite
Hardness: 7
Rossovskyite
Hardness: 6
Rostite
Roterbärite
Rouaite
Roubaultite
Hardness: 3
Roumaite
Rouseite
Hardness: 3
Routhierite
Hardness: 3.5
Rouvilleite
Hardness: 3
Rouxelite
Roweite
Hardness: 5
Rowlandite-(y)
Hardness: 5.5 - 6.5
Rowleyite
Hardness: 2
Roxbyite
Hardness: 2.5 - 3
Roymillerite
Rozenite
Hardness: 2 - 3
Rozhdestvenskayaite-(zn)
Hardness: 3
Rruffite
Hardness: 3
Ruarsite
Hardness: 6 - 7
Rubicline
Rubinite
Ruby in Feldspar
Ruby in Fuchsite
Ruby in Zoisite
Rucklidgeite
Hardness: 2.5
Rudabányaite
Rudashevskyite
Rudenkoite
Hardness: 1.5
Rüdlingerite
Ruifrancoite
Hardness: 4.5
Ruitenbergite
Hardness: 3 - 4
Ruizite
Hardness: 5
Rumoiite
Rumseyite
Rusakovite
Hardness: 1.5 - 2
Rusinovite
Hardness: 3 - 4
Russellite
Hardness: 3.5
Russoite
Rustenburgite
Hardness: 5
Rustumite
Ruthenarsenite
Hardness: 6 - 6.5
Rutheniridosmine
Hardness: 6 - 7
Ruthenium
Hardness: 6.5
Rutherfordine
Rynersonite
Hardness: 4.5
Saamite
Hardness: 3
Sabatierite
Hardness: 2.5
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