An uncut opal is a type of semi-precious gem in RuneScape. Uncut opals can be cut with a chisel by a player with level 1 Crafting resulting in an opal or a crushed gem. Successfully cutting an opal grants the player 15 Crafting experience; smashing grants 3.8.
Uncut opals are primarily obtained by mining gem rocks in Shilo Village, which requires 40 Mining. The gem rocks that appear while playing the Tai Bwo Wannai Cleanup minigame may also yield uncut opals, but the gem rocks in Prifddinas cannot. Unlike higher-level gems, uncut opals are not found periodically while mining other ores. They may also be found while panning at the Digsite near the River Salve, or pickpocketed from H.A.M. members via the Thieving skill.
Opals are sometimes used in bulk to train crafting, but this is slow, and will probably lose the player money. When cutting opals, the player may accidentally smash it into a crushed gem instead of a cut opal, awarding 3.8 Crafting experience rather than 15. The chance to crush an Opal decreases with higher Crafting skill, but is always still a possibility.
The profit or loss for fletching bolts assumes starting with an uncut gem.
The Craft XP assumes the success rate given in the Opal article for level 50 Crafting.
Cut opals may be sold to Gabooty's Tai Bwo Wannai Cooperative in Tai Bwo Wannai Village for 30 trading sticks, while uncut may be sold for 12. This may be explained by the fact that attempting to cut opals usually destroys many of them, increasing the value of opals that actually survive the cutting process. During the Digsite Quest, one of the NPC's asks for an uncut opal in return for some of the answers.
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