| 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 | |