Water sensitive crystals
If you own or plan to collect crystals, it’s essential to know which ones are sensitive to light or moisture. Prolonged exposure to sunlight or high humidity can cause some crystals to fade, darken, or even break. Protect these delicate stones by storing them in a dark, dry place.
Crystals That Fade, Darken, or Break in water
| Alum-k | Aluminocopiapite | Amarantite |
| Aphthitalite | Apjohnite | Bandylite |
| Bararite | Barite (slowly dissolves in water) | Bieberite |
| Bischofite | Blödite | Bobjonesite |
| Boothite | Boracite | Borax |
| Boussingaultite | Burkeite | Caichengyunite |
| Carnallite | Celestine (very slowly dissolves in water) | Chalcanthite |
| Chalcocyanite | Changoite | Cinnabar (toxic in water) |
| Cobaltkieserite | Colemanite (very slowly dissolves in water) | Copiapite |
| Coquimbite | Coskrenite-(Ce) | Cryolite (very slowly dissolves in water) |
| Cryptohalite | Dorfmanite | Epsomite |
| Eriochalcite | Ettringite (partially dissolves in water) | Ferruccite |
| Fluorite (slowly dissolves in water) | Gaylussite (very slowly dissolves in water) | Goslarite |
| Halite | Halotrichite | Hanksite |
| Hibbingite | Hieratite | Hoganite |
| Hummerite | Hutchinsonite (toxic in water) | Hydroboracite (very slowly dissolves in water) |
| Ilesite | Inderborite | Inyoite (slowly dissolves in water) |
| Julienite | Kalicinite | Kaliborite (very slowly dissolves in water) |
| Kalinite | Kernite (very slowly dissolves in water) | Koktaite |
| Konyaite | Kornelite | Krohnkite (very slowly dissolves in water) |
| Kremersite | Lanmuchangite | Lecontite |
| Leonite | Letovicite | Levinsonite-(Y) |
| Lopezite | Magnesite (very slowly dissolves in water) | Malachite (toxic in water) |
| Mascagnite | Melanterite | Mercallite |
| Morenosite | Nahcolite | Natrosilite |
| Nitratine | Nitre | Orpiment (toxic in water) |
| Paceite | Paracoquimbite | Penfieldite |
| Phosgenite (very slowly dissolves in water) | Pickeringite | Picromerite |
| Pirssonite | Potassium Alum | Probertite |
| Retgersite | Rhodochrosite (very slowly dissolves in water) | Rinneite |
| Salammoniac | Scacchite | Sellaite (very slowly dissolves in water) |
| Shortite (very slowly dissolves in water) | Siderite (very slowly dissolves in water) | Starkeyite |
| Stepanovite | Sulphohalite | Swaknoite |
| Sylvite | Syngenite | Tachyhydrite |
| Tamarugite | Teschemacherite | Thenardite |
| Thermonatrite | Trona | Tschermigite |
| Villiaumite | Voltaite | Wilcoxite |
| Zhemchuzhnikovite | Zugshunstite-(Ce) |