OSRS Drop Calculator › Uncut opal

Best way to farm Uncut opal

All 3 monsters that drop Uncut opal, ranked by realistic quantity per hour — not just drop rate. Change the seconds-per-kill for any monster to match your own speed.

Drop data: Uncut opal on the OSRS Wiki

Currently fastest method
Gemstone Crab
122 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Gemstone Crab
Combat lvl 160
9/32 · 1 (3 rolls)
 0.844 25 144 122
Skeleton Mage (Level 83)
Combat lvl 83
10/128 · 1
 0.078 19 189 15
H.A.M. Guard
Combat lvl 12–22
2/110 · 1
 0.018 9 400 7.3
How this is calculated: items/hr = (3600 ÷ seconds per kill) × average items per kill. Each monster's drop lines are listed as the wiki shows them (rarity · quantity); the average adds them all up, each as rarity × average quantity × rolls — so a guaranteed drop plus a rarer bonus drop both count. Drop rates and quantities come from the OSRS Wiki's community-verified drop tables. Seconds-per-kill is an editable estimate based on each monster's hitpoints and defence — your real speed depends on your stats and gear, so adjust it and your edits are remembered on this device. Rates marked ~ are approximate on the wiki.

Something wrong on this page?

Drop rates come from the OSRS Wiki and kill times are estimates, so mistakes happen. Tell us what's off and it'll be looked at.