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Clockwork
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 If prices appear to be outdated, purge the page by clicking here.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 table below lists the profit (or loss) made from cutting gems, aswell as the cost/xp of each.

Gem Cutting

Jewel

Level Cost Uncut Value Cut Profit or loss XP (Smashed) XP (Cut) Profit/loss per XP % Success Required to Break Even Profit/Loss
Opal Opal 1 239 308 69* 3.8 15 4.6* 77.597402597403
Jade Jade 13 375 538 163* 5 20 8.15* 69.702602230483
Red topaz Red topaz 16 4,264 4,902 638* 6.3 25 25.52* 86.984904120767
Sapphire Sapphire 20 859 486 -373 N/A 50 -7.46
Emerald Emerald 27 900 585 -315 N/A 67 -4.7
Ruby Ruby 34 1,545 1,078 -467 N/A 85 -5.49
Diamond Diamond 43 3,016 2,008 -1,008 N/A 107.5 -9.38
Dragonstone Dragonstone 55 13,867 12,000 -1,867 N/A 137.5 -13.58
Onyx Onyx 67 2,976,830 2,991,606 14,776 N/A 167.5 88.21
Zenyte Zenyte 89 13,805,384 14,385,635 580,251 N/A 200 2,901.26
  • This assumes that all gems are successfully cut, as crushed gems can only be sold to the general store in Shilo Village for 1 coin each.
  • Success rate of cutting a gem varies by gem and scales with level. See gem pages for success rates by level.