Motherlode Mine Calculator
Exact pay-dirt mechanics from the server: vein XP scales with your prospector kit (up to ×3.5 with the full set), each cleaned bag rolls nuggets then ores by level, and every ore pays its own Mining XP - all multiplied by the server's ×18 rate. Live GE prices show what your bags are actually worth.
| Outcome | Chance | Ore XP (×18) | Live price | In 1,000 bags |
|---|---|---|---|---|
 item 12012 | 16.0% | - | - | 160 |
 item 451 | 0.0% | 1,350 | - | 0 |
 item 449 | 0.0% | 810 | - | 0 |
 item 447 | 0.0% | 540 | - | 0 |
 item 444 | 0.0% | 270 | - | 0 |
 item 453 | 84.0% | - | - | 840 |
Prospector kit costs & XP multiplier
| Helmet | +40% XP | 40 nuggets | ~250 pay-dirt |
| Jacket | +80% XP | 60 nuggets | ~375 pay-dirt |
| Legs | +60% XP | 50 nuggets | ~313 pay-dirt |
| Boots | +20% XP | 30 nuggets | ~188 pay-dirt |
| Full set bonus | +50% XP | 180 nuggets total | max ×3.5 |
Verified against MotherlodeManager/PaydirtOre: vein XP is 60 × your prospector multiplier, then ×18. Each cleaned pay-dirt rolls nugget (4/25) → runite (1/70 at 85+) → adamant (1/8 at 70+) → mithril (1/4 at 55+) → gold (1/3 at 40+) → coal. Rockfall clearing grants 180 XP. Requires 30 Mining; the upper level needs 72 and the Mining Guild shortcut 60.
Frequently asked questions
How much XP does pay-dirt give with the prospector kit?
Base vein XP is 60 per pay-dirt on this server, multiplied by the prospector bonus: helmet +0.4, jacket +0.8, legs +0.6, boots +0.2, plus a +0.5 full-set bonus - up to ×3.5. The 18× skilling multiplier applies on top of that.
What are the golden nugget odds?
Each cleaned pay-dirt rolls a golden nugget at 4/25 (16%). At 30 Mining you average a nugget roughly every 6 bags.
Which ores can I get at my level?
The server rolls ores sequentially: runite needs 85 (1/70), adamantite needs 70 (1/8), mithril needs 55 (1/4), gold needs 40 (1/3), and coal is the fallback. Toggle the kit pieces and set your level to see your exact odds and expected bag value.
How many nuggets does the prospector set cost?
Helmet 40, jacket 60, legs 50, and boots 30 - 180 nuggets for the full set, or about 1,125 bags of pay-dirt at the 4/25 rate.