Liquid
Most crystals will remain unaffected if exposed briefly to water. Some crystals, if exposed to liquid for long periods of time, may become brittle or more easily scratched. In extreme cases, liquids can damage your crystals, like halite in water or calcite around acids like vinegar. Caution being what it is, it's best not to take your crystals or crystal jewellery swimming, showering, or bathing with you.