Geo

 is an NPC in the Dwarven Mines that explains the use of Gemstones. Directly next to him you can find the Gemstone Grinder where items and armor can be upgraded using Gemstones.

Gemstone Grinder
the Gemstone Grinder next to Geo, players can apply Gemstones to specific items. These provide specific stats for each Gemstone.

Tip: Clicking on the redstone torch will bring up the Gemstone Guide, showing what items can have gemstones applied to them

First interaction

 * Gemstone have magical properties and can be applied to some special items
 * There are different Gemstones, all of them having their own unique properties!
 * For example, adding to armor will increase its, while  increases.
 * The more pure the Gemstone - the stronger the effect!
 * Only some items can have Gemstones applied, and you can remove them at any time.
 * Use the next to me to apply Gemstones to items!

Subsequent interactions

 * The more pure the Gemstone - the stronger the effect!
 * There are several qualities of Gemstone, including Rough, Flawed, and.
 * The highest quality of Gemstone - - will increase your stats the most!