Crystals that should(n’t) be placed in water according to their MOHS HARDNESS SCALE:
Crystals that are 5 or below on the Mohs harness scale should not be put in water. They dissolve or crack if left in water for long periods of time. Some harder crystals should also be kept out of water.
1
-Talc
2-3
-Gypsum, Chrysocolla, Amber, Lepidolite, Pearl, Selenite, Halite (Rock Salt)
3-4
-Calcite, Celestite, Cerussite, Coral, Azurite, Malachite, Angelite, Jet stone
4-5
- Fluorite, Rhodocrosite, Ammolite, Larimar, Charoite
5-6
- Apatite, Apophyllite, Obsidian, Cats Eye, Chrome/Star Diopside, Turquoise, Lapis Lazuli, Sodalite, Opal, Rhodonite, Haemetite
6-7
- Orthoclase feldspar, Carnelian, Opalite, Peridot, Kyanite, Moonstone, Labradorite, Amazonite, Chrysoprase, Chalcedony, Zircon, Bloodstone, Jade
7-8
-Quartz, Tigers Eye, Amethyst, Citrine, Agate, Rose Quartz, Jasper, Citrine, Agate, Garnet, Mookite, Smoky Quartz, Tourmaline, Danburite, Ametrine, Aventurine, Rutile Quartz, Kunzite, Onyx
8-9
-Topaz, Goshenite, Morganite, Beryl, Aquamarine, Emerald
9-10
-Corundum, Ruby, Sapphire
10
-Diamond














