Zenyte gems are the rarest gems in Old School RuneScape, and are used in the Crafting skill. A zenyte can be made by using a chisel on an uncut zenyte with a crafting level of 89 or higher, granting 200 experience in doing so.
Cut zenytes can be crafted into jewellery, requiring a gold bar and the corresponding mould.
Zenyte jewellery can be enchanted by casting the Lvl-7 Enchant spell on a piece of zenyte jewellery, requiring level 93 Magic, 20 blood runes, 20 soul runes and 1 cosmic rune to cast, and granting 110 experience. Enchanted zenyte jewellery are some of the most powerful in the game. Wearing any piece of enchanted zenyte jewellery requires level 75 in hitpoints.