Gemcutter’s Prism

PoE Gemcutter's Prism Recipe

When done for multiple instances of the recipe at once, each individual combination must add up to 40%. For example: 6 items of 19%, 13%, 15%, 9%, 17% and 7% quality would add up to 80%, but would not actually grant 2 Gemcutter's Prism items, only 1. This is because the 2 individual combinations do not add up to 40 each.

20% Quality skill gem recipe example

Vendor list: 1x Divine Ire(Quality: +20%).

Recipe result: 1x Gemcutter's Prism

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40% Quality skill gems recipe example

Vendor list:

• Blood and Sand, Quality: +13%
• Dual Strike, Quality: +12%
• Summon Skeletons, Quality: +15%

The total quality is 40%. Selling these skill gems to any vendor in exchange for a Gemcutter's Prism.

How to improve the quality of a Gem?

1. Gemcutter’s Prism: up to 20% quality

Gemcutter’s Prism (often abbreviated GCP) is a currency item that can be used to improve the quality of a gem. Its quality bonuses depend on the type of skill gem. Each Gemcutter's Prism will always raise the quality by 1%. The maximum quality is 20% by using Gemcutter’s Prism.

Both active and support skill gems may have quality. Every skill is affected by quality differently, but frequently it somehow improves the damage dealt with the skill. Buffs and curses, obviously, do not have their damage improved. Even those that do have their damage improved will see different rates of improvement for a given amount of quality.

The effect of quality scales with the base quality effect, however, only whole numbers will be granted (and thus the effect will always be rounded down); for example 3% quality on a gem with 0.5% effect will only grant 1% effect and not 1.5% effect. Effects that have some degree of fractions naturally are rounded to their natural bases (i.e. seconds will be rounded to milliseconds, etc.).

2. Beastcrafting crafting recipe: 23% Quality Corrupted Gem

Beastcrafting is a method of crafting by sacrificing beasts to the blood altar in the Menagerie. Each beastcrafing recipe requires four beasts to be sacrificed, with most of them requiring one specific Red Beast and three Rare Beasts. The four chosen beasts are released into the arena surrounding the blood altar and must be killed to complete the recipe. If the player dies during the attempt, the recipe fails and the beasts are lost.

If an item is created, the resulting item level is equal to the level of the main beast sacrificed. Recipes that create unique items can generate league-specific uniques. The table below displays the resulting crafts when sacrificing to the blood altar.

Header	Subheader	Components
Create an Item	23% Quality Corrupted Gem	1x level 0+ Farric Magma Hound
Create an Item	Level 21 Corrupted Gem	1x level 0+ Farric Pit Hound

3. Enhance Support: +(0-24)% to Quality of Supported Active Skill Gems

Enhance is a support gem that increases the quality of supported active skill gems.

Level	+% Gem Quality	Exp.	Total Exp.
1	N/A	0	0
2	8%	226,854,909	226,854,909
3	16%	1,439,190,228	1,666,045,137
4	24%	N/A	N/A

4. Vaal Orb corruption: up to 23% quality

Like most items, gems can be corrupted using a Vaal Orb. Corruption on gems can potentially lift the level of quality percentage of a gem above the maximum of 20. Corruption can also convert a gem into its Vaal skill equivalent if one exists. Using Vaal Orb corrupts a gem, it may have one of the following effects:

• No effect (other than adding the corrupted property).
• Add or subtract one level. Max level gems can exceed their normal maximum this way. A corrupted gem at the normal maximum will not continue to gain experience.
• Add or subtract 1-20 quality. Gems can have up to 23% quality this way.
• Change the gem to its corresponding Vaal Gem.

5. Quality 20% skill gem vendor recipes

Result	Recipes	Notes
20% quality skill gem	1x level 20 skill gem 1x Gemcutter's Prism	The resulting gem will be of the same skill, and will have its level reset to 1. Does not work with Corrupted 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.

6. 20% Quality Gem Prophecy: Erasmus' Gift

Erasmus’ Gift is a prophecy.

Objective: Find a skill gem.

Reward: The skill gem will have 20% quality.

PoE GCP Farming

1. Farming Gemcutter’s Prism by slain monsters

The drop level of Gemcutter’s Prism is 12 and the drop rate is around 0.275%. You can obtain the currency by killing enemies, destroying chests, and opening Artisan's Strongbox.

2. Do GCP Vendor Recipe

You can do the above vendor recipe to get a lot of GCP in PoE.

3. Gemcutter’s Prism Divination Card

Amount	Divination Card	General Notes	Drop Areas
7	The Union	10x Gemcutter's Prism	Cemetery Map • Graveyard Map
3	The Gemcutter	1x Gemcutter's Prism	Can drop from Gemcutter's Strongboxes.
5	The Master Artisan	20x quality currency (random)	Can drop from Artisan's Strongboxes.
5	Emperor's Luck	5x currency (random)	The Imperial Gardens • The High Gardens • Courtyard Map • Orchard Map • Terrace Map

Quality currency includes Glassblower's Bauble, Blacksmith's Whetstone, Armourer's Scrap, Cartographer's Chisel, and Gemcutter's Prism.

4. Trade Currency for GCP

You can exchange currency items for Gemcutter’s Prism with other players. The ratio of Gemcutter’s Prism to Chaos Orb is 2:1.