Hardness (Mohs) Mineral Group
     
3 Calcite  
3 Inderite  
3 - 3.5 Angelite / Anhydrite  
3 - 3.5 Barite  
3 - 3.5 Boleite  
3 - 3.5 Celestine  
3 - 3.5 Cerussite  
3 - 3.5 Mottramite  
3 - 3.5 Phosphophyllite  
3 - 3.5 Remondite  
3 - 3.5 Sussexite  
3 - 3.5 Witherite  
3 - 4 Cavansite  
3 - 4 Pearls  
3 - 4.5 Shortite  
3.5 Adamite  
3.5 Cubanite  
3.5 Thaumasite  
3.5 - 4 Aragonite  
3.5 - 4 Azurite  
3.5 - 4 Cuprite  
3.5 - 4 Dolomite  
3.5 - 4 Goergeyite  
3.5 - 4 Malachite  
3.5 - 4 Mimetite  
3.5 - 4 Phosphosiderite  
3.5 - 4 Powellite  
3.5 - 4 Pyromorphite  
3.5 - 4 Scorodite  
3.5 - 4 Sphalerite  
3.5 - 4 Wavellite  
3.5 - 4 Zeiringite Aragonite
3.5 - 4.5 Magnesite  
3.5 - 5 Nifontovite  
3.75 - 4.25 Siderite