An Uncut sapphire is a blue gem used in Crafting and Fletching. An uncut sapphire can be cut by a player with level 20 Crafting by using it with a chisel, which makes the uncut sapphire into a sapphire and yields 50 Crafting experience.
Members can use the Fletching skill to cut a sapphire into sapphire bolt tips by using a chisel on a 'cut' sapphire at level 56 fletching. Cutting a sapphire into bolt tips grants the player 4 experience in the fletching skill and gives the player 12 sapphire bolt tips.
There is a cave to the north-west of Rellekka where up to 8 uncut sapphires can be mined for The Tale of the Muspah quest. These rocks do not respawn.
Prior to the introduction of the Grand Exchange, the examine text on uncut stones said 'This would be worth more if it was cut'. However after the Grand Exchange was introduced, such description no longer matched the actual market facts and thus this was changed.
Although formally released on 8 May2001, uncut gems were briefly obtainable following the 17 March 2001 cooking update, before the crafting skill was fully implemented.