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 3781-3840 of 5,084 specimens
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Ramosite
Ramsbeckite
Hardness: 3.5
Ramsdellite
Hardness: 3
Ranciéite
Hardness: 2.5 - 3
Rankachite
Hardness: 2.5
Rankamaite
Hardness: 3 - 4
Rankinite
Hardness: 5.5
Ransomite
Hardness: 2.5
Ranunculite
Hardness: 3
Rapidcreekite
Hardness: 2
Rappoldite
Hardness: 4.5
Raslakite
Hardness: 5
Raspite
Hardness: 2.5 - 3
Rastsvetaevite
Hardness: 5 - 6
Rasvumite
Hardness: 4 - 5
Rathite
Hardness: 3
Rauchite
Hardness: 2
Rauenthalite
Hardness: 2
Rauvite
Ravatite
Hardness: 1
Raygrantite
Hardness: 3
Rayite
Hardness: 2.5
Realgar
Hardness: 1.5 - 2
Reaphookhillite
Rebulite
Rectorite
Hardness: 0.5 - 1
Redcanyonite
Hardness: 2
Reddingite
Hardness: 3.5
Redgillite
Hardness: 2
Redingtonite
Hardness: 2
Redledgeite
Hardness: 6 - 7
Reederite
Reederite-(y)
Hardness: 3 - 3.5
Reedmergnerite
Hardness: 6 - 6.5
Reevesite
Hardness: 2
Refikite
Hardness: 1
Reichenbachite
Hardness: 3.5
Reidite
Hardness: 7.5
Reinerite
Hardness: 5 - 5.5
Reinhardbraunsite
Hardness: 5 - 6
Rémondite-(ce)
Hardness: 3 - 3.5
Rémondite-(la)
Hardness: 3
Renardite
Rengeite
Hardness: 5 - 5.5
Renierite
Hardness: 4 - 5
Reppiaite
Hardness: 3 - 3.5
Retgersite
Hardness: 2.5
Retzian-(ce)
Hardness: 4
Retzian-(la)
Hardness: 3 - 4
Retzian-(nd)
Hardness: 3 - 4
Revdite
Hardness: 2
Reyerite
Hardness: 3 - 4
Reynoldsite
Hardness: 4.5
Rhabdoborite-(mo)
Rhabdoborite-(v)
Rhabdoborite-(w)
Rhabdophane-(ce)
Hardness: 3.5
Rhabdophane-(la)
Hardness: 3.5
Rhabdophane-(nd)
Hardness: 3.5
Rhabdophane-(y)
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