RuneScape Classic Wiki
The main RuneScape Wiki has an article on: Uncut emerald
The Old School RuneScape Wiki also has an article on Uncut emerald.

An uncut emerald is an uncut gem that is used in the Crafting skill. Uncut emeralds can be cut at level 27 Crafting by using it with a chisel, yielding 67.5 experience. Emeralds can then be used to create emerald jewelry.

Uncut emeralds can be obtained:


Store Location Stock
Al Kharid gem stall Al Kharid 1
Herquin's Gems Southwest Falador 0

Dropped by

All monsters with access to the rare drop table. Shadow Warriors have a relatively greater chance to use the rare drop table over other monsters.