Opals are sometimes used in bulk to train Crafting, but this is slow. When cutting opals, many of the gems get accidentally crushed into a crushed gem. This continues to happen commonly even at high levels, resulting in only 3.8 Crafting experience. Opals can be smelted with silver bars to create opal jewellery. Using the chisel on an already cut opal will make 12 opal bolt tips (this operation will never smash a gem) and gives the player 1.5 Fletching experience per gem. Opal tips are used to tip bronze bolts which can then be enchanted.
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