Sapphire

Sapphire is one of the 8 Infusable gemstones. It can be infused by laying the stone on a beach at low tide, and retrieving it after the high tide has washed over it. It has a variety of uses:
 * Herblore: grants Waterbreathing.
 * Weapon: slows the foe
 * Shield: when an enemy attack misses, the bearer is allowed to flow behind the foe.
 * Self-Infusion: grants Waterbreathing.
 * When kept in a vial, it attracts moisture from the air, slowly filling up the vessel with clean water.