Crushed Gemstone

The RuneScape Wiki also has an article on: rsw:Crushed gemThe Old School RuneScape Wiki also has an article on: osrsw:Crushed gem

Crushed Gemstone
Released							27 January 2003 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Examine							A gemstone that has been smashed
Values
Value							2 coins
High alch							1 coin
Low alch							0 coins
Advanced data
Item ID							915

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Crushed Gemstone is what remains after you fail to use properly a chisel on an uncut semiprecious gem such as Opal, Jade, and Red Topaz. Accidentally crushing a gemstone awards 3.75 Crafting experience for Opals, 5 experience for Jade and 6.25 experience for Red Topaz.

As a players Crafting level increases, the chance of failing to cut semiprecious gems decreases. Crushed Gemstones have no known use and are considered a useless item.