A sapphire is a cut blue gem used in Crafting and Fletching. An uncut sapphire can be crafted into a sapphire by a player with level 20 Crafting, yielding 50 Crafting experience. Uncut sapphires can be obtained randomly while miningores, dropped as loot from defeating monsters, and may by rewarded as a prize from many Distractions and Diversions among other places.
Prior to the introduction of Grand Exchange the examine text on uncut stones read: "This would be worth more if it was cut." This description no longer matched the actual trading value of the gem, and thus this was later changed.