Gemcutter's PrismStack Size: 20Improves the quality of a gemRight click this item then left click a gem to apply it. The maximum quality is 20%. Shift click to unstack.
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%.
The Master ArtisanThe Master Artisan520x Quality CurrencyPerfection is the standard, excellence will be handled on a case by case basis.
Random quality currency x20
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1
The VoidThe Void1Reach into the Void and claim your prize.
Random divination card set exchange
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Spending
Obtaining many Gemcutter's Prisms by vendoring multiple quality gems
Because Gemcutter's Prisms are relatively rare, it is not advised to apply them to gems that have little or no quality. However, selling a Gemcutter's Prism along with a level 20 gem to any vendor will give you a 20% quality, level 1 version of that same gem. Because it is possible to level many gems at once, it is generally considered a cost-efficient method of obtaining 20% quality gems if the player does not have the means to obtain a large number of Gemcutter's Prisms.
Alternatively, players can obtain Gemcutter's Prisms by vendoring a large quantity of gems that have some quality each. (picture on right)