OSRS Drop Calculator › Unidentified rare fossil

Unidentified rare fossil

Best way to farm Unidentified rare fossil

All 10 monsters that drop Unidentified rare fossil, 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: Unidentified rare fossil on the OSRS Wiki

Currently fastest method
Lobstrosity
0.4 / hr
Monster Drops (rarity · quantity) Avg/kill Sec/kill Kills/hr Qty/hr
Combat lvl 68
5/3,500 · 1
 1 per 700 kills 13 277 0.4
Combat lvl 19
3/3,500 · 1
 1 per 1,167 kills 8 450 0.4
Combat lvl 152 · Slayer 66
10/3,500 · 1
 1 per 350 kills 41 88 0.3
Combat lvl 147 · Slayer 66
10/3,500 · 1
 1 per 350 kills 42 86 0.2
Combat lvl 139 · Slayer 66
10/3,500 · 1
 1 per 350 kills 43 84 0.2
Combat lvl 109 · Slayer 57
7/3,500 · 1
 1 per 500 kills 34 106 0.2
Combat lvl 210 · Slayer 82
12/3,500 · 1
 1 per 292 kills 66 55 0.2
Combat lvl 276
12/3,500 · 1
 1 per 292 kills 68 53 0.2
Combat lvl 132
5/3,500 · 1
 1 per 700 kills 41 88 0.1
Combat lvl 25
3/3,500 · 1
 1 per 1,167 kills 26 138 0.1

How this is calculated

Items per hour = kills per hour × average items per kill.

Average items per kill adds up every drop line as the wiki shows it (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 drop tables; rates marked ~ are approximate on the wiki. "via" means the item comes inside another drop, like red spiders' eggs in Sarachnis's giant egg sac.

Kill times are estimates, worked out the same way for every monster from its hitpoints and defence. Add your RuneScape name in Preferences and they're worked out from your own combat levels instead. We can't see your gear or include boss mechanics, so expect individual times to be off; what matters is how the monsters compare. You can type your own time for any monster: it's remembered on this device for every page (↺ goes back to the default), and shared anonymously to help improve the estimates (privacy).

Achievement diaries that improve a drop rate or quantity can be ticked in Preferences.

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.