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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 If prices appear to be outdated, purge the page by clicking here.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.

Gem Cutting Loss/Profit CalculatorEdit

Note: The following calculations use real-time market prices. For more information, see Grand Exchange Market Watch.
Variety of Gem Level Uncut Gem Cost Cut Gem Value XP Each Loss/Profit (Per Gem) Loss/Profit (Per XP)
Uncut opalOpal Opal1 1 430 412 Chisel 15 -18 -1.2
Uncut jadeJade Jade1 13 2,945 2,906 Chisel 20 -39 -2
Uncut red topazRed topaz Red Topaz1 16 2,321 2,223 Chisel 25 -98 -3.9
Uncut sapphireSapphire Sapphire 20 667 323 Chisel 50 -344 -6.9
Uncut emeraldEmerald Emerald 27 1,951 1,580 Chisel 67.5 -371 -5.5
Uncut rubyRuby Ruby 34 1,527 721 Chisel 85 -806 -9.5
Uncut diamondDiamond Diamond 43 2,970 1,429 Chisel 107.5 -1,541 -14.3
Uncut dragonstoneDragonstone Dragonstone 55 11,322 9,198 Chisel 137.5 -2,124 -15.4
Uncut onyxOnyx Onyx 72 2,571,035 2,586,787 Chisel 167.5 15,752 94
Uncut hydrixHydrix Hydrix 79 22,400,880 21,834,716 Chisel 197.5 -566,164 -2,866.7

Gem Cutting Profit Calculator with Crystal Chisel & Portable CrafterEdit

Variety of Gem Level Uncut Gem Cost Cut Gem Value XP Each Loss/Profit (Per Gem) Loss/Profit (Per XP) Loss/Profit (Per XP) Portable crafter
Uncut sapphireSapphire Sapphire 20 667 323 Crystal chisel 50 -338 -6.8 -5.5
Uncut emeraldEmerald Emerald 27 1,951 1,580 Crystal chisel 67.5 -340 -5 -3.3
Uncut rubyRuby Ruby 34 1,527 721 Crystal chisel 85 -792 -9.3 -7.7
Uncut diamondDiamond Diamond 43 2,970 1,429 Crystal chisel 107.5 -1,513 -14.1 -12.3
Uncut dragonstoneDragonstone Dragonstone 55 11,322 9,198 Crystal chisel 137.5 -1,941 -14.1 -9.1

1 These gems have a possibility of failing to cut, causing it to shatter. 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 using this type of gem.