Calculator:Crafting/Gem cutting

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 This is a static calculator.
It does not take user inputs, but it does use changing prices from the Grand Exchange Market Watch. If prices appear to be outdated, purge the page by clicking here.

The gem cutting calculator is a calculator using current exchange prices which shows you how much money you will lose or gain by successfully cutting one of each gem type assuming you buy and sell the gems using the grand exchange. Using high or low alchemy may affect how much you lose or gain from cutting gems. Also, buying higher than or selling lower than the current market price (such as buying at highest price or selling at lowest price) will cause you to lose more money when cutting gems.

To determine how much you will lose or gain from cutting more than one gem of the same variety, multiply the number of gems you plan on cutting by the value in the per gem column. To determine how much it will cost per level, multiply the amount of crafting XP until the next level by the value in the per XP column.

The best profit/loss uses a crystal chisel, portable crafter, and brooch of the gods.

Profit when cutting gems[edit source]

Type Level Uncut price Cut price XP Crafting Profit per gem Profit per XP
Uncut opal.png: RS3 Inventory image of Uncut opalUncut opal[1] 1 600 439 15 −161 −10.7
Uncut jade.png: RS3 Inventory image of Uncut jadeUncut jade[1] 13 2,608 3,670 20 1,062 53.1
Uncut red topaz.png: RS3 Inventory image of Uncut red topazUncut red topaz[1] 16 900 870 25 −30 −1.2
Uncut sapphire.png: RS3 Inventory image of Uncut sapphireUncut sapphire 20 512 344 50 −168 −3.4
Uncut emerald.png: RS3 Inventory image of Uncut emeraldUncut emerald 27 477 412 67.5 −65 −1
Uncut ruby.png: RS3 Inventory image of Uncut rubyUncut ruby 34 441 407 85 −34 −0.4
Uncut diamond.png: RS3 Inventory image of Uncut diamondUncut diamond 43 823 600 107.5 −223 −2.1
Uncut dragonstone.png: RS3 Inventory image of Uncut dragonstoneUncut dragonstone 55 4,950 4,141 137.5 −809 −5.9
Uncut onyx.png: RS3 Inventory image of Uncut onyxUncut onyx 72 1,068,307 1,091,855 167.5 23,548 140.6
Uncut hydrix.png: RS3 Inventory image of Uncut hydrixUncut hydrix 79 73,079,743 67,694,283 197.5 −5,385,460 −27,268.2
  1. ^ a b c Players have a chance (higher at low Crafting level) at failing to cut these gems, turning it into useless crushed gem. If this happens, you will receive minimal experience, and you will not make any money back if you paid for the gem. It is not recommended to train with these types of gems.

Profit when cutting gems with a crystal chisel[edit source]

Type Level Uncut price Cut price XP Crafting Average profit per gem[1] Profit per XP[1]
Uncut sapphire.png: RS3 Inventory image of Uncut sapphireUncut sapphire 20 512 344 50 −161.7 −3.2
Uncut emerald.png: RS3 Inventory image of Uncut emeraldUncut emerald 27 477 412 67.5 −57.3 −0.8
Uncut ruby.png: RS3 Inventory image of Uncut rubyUncut ruby 34 441 407 85 −26.4 −0.3
Uncut diamond.png: RS3 Inventory image of Uncut diamondUncut diamond 43 823 600 107.5 −211.5 −2
Uncut dragonstone.png: RS3 Inventory image of Uncut dragonstoneUncut dragonstone 55 4,950 4,141 137.5 −726.7 −5.3
  1. ^ a b A crystal chisel has a 2% chance of doubling the cut gem and consuming charge. The calculation assumes the maximum recharge efficiency (1,500 coins to double 56 gems, or 26.79 per gem).

Profit when cutting gems with a portable crafter[edit source]

Type Level Uncut price Cut price XP Crafting Average profit per gem[1] Profit per XP[1] Average profit per gem
(with brooch of the gods)[1] 		Profit per XP
(with brooch of the gods)[1]
Uncut sapphire.png: RS3 Inventory image of Uncut sapphireUncut sapphire 20 512 344 50 −142.4 −2.6 −116.8 −2.1
Uncut emerald.png: RS3 Inventory image of Uncut emeraldUncut emerald 27 477 412 67.5 −41.2 −0.6 −17.3 −0.2
Uncut ruby.png: RS3 Inventory image of Uncut rubyUncut ruby 34 441 407 85 −12 −0.1 10.1 0.1
Uncut diamond.png: RS3 Inventory image of Uncut diamondUncut diamond 43 823 600 107.5 −181.9 −1.5 −140.7 −1.2
Uncut dragonstone.png: RS3 Inventory image of Uncut dragonstoneUncut dragonstone 55 4,950 4,141 137.5 −561.5 −3.7 −314 −2.1
  1. ^ a b c d A portable crafter gives a 10% experience boost and has a 5% chance to save the uncut gem. The chance to save the gem is increased to 10% with brooch of the gods. The calculation does not include the cost of the portable.
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