A Gemcutter's Prism (often abbreviated GCP) is a currency item that can be used to improve the quality of a gem. Each Gemcutter's Prism will always raise the quality by 1%.
A Gemcutter's Prism may be vendored with a level 20 support gem to produce a level 1 version of that support gem with 20% quality. Leveling gems in the alternative weapon set is generally considered a cost-efficient method of obtaining 20% quality support gems if the player does not have the means to obtain a large number of Gemcutter's Prisms.
Gemcutter's Prisms may be acquired from vendors by selling a single 20% quality gem, or multiple gems with a total quality of 40% or more.
Obtaining many Gemcutter's Prisms by vendoring multiple quality gems
Item acquisition
Gemcutter's Prism can drop anywhere.
Recipes
Gemcutter's Prism can be created from the following recipes:
Amount
Part
Description
Meta
7
The UnionThe Union710x Gemcutter's PrismOn the 21st of Eterni, two become one, their light outshines the setting sun.
10x Gemcutter's Prism
M
3
The GemcutterThe Gemcutter3Gemcutter's PrismIn the hands of a master craftsman, a worthless pebble can adorn the crown of a king.
The vendor recipe for turning a Level 20 Gem into a 20% Quality Level 1 version of that Gem no longer works with Skill Gems, as the benefit Quality provides to damage dealing Skills is now more powerful. The vendor recipe can now only be used with non-Awakened Support Gems.
Added two new currency items with temporary art/names. They upgrade the quality on Flasks and Skill Gems respectively. (The latter was Gemcutter's Prism)