The Black tourmaline core takes about
20 hours and 50 minutes to obtain if you are exactly on droprate.
The time to obtain Black tourmaline core at Grotesque Guardians, if you are exactly on drop rate, will be 25 hours with beginner gear, 20 hours and 50 minutes with average gear and 16 hours and 40 minutes in max gear. That is about 500 kills on average.
Customize your estimated kills per hour above to see your own time to be on drop rate.
Additional information
During this grind you will also be making roughly 35,586,192 gp in total loot — about 1,708,137 gp per hour at 24 kills per hour. The biggest earner over that stretch is Granite hammer at about 10,564,551 gp.
Each kill has a 0.2% chance at Black tourmaline core. Half of all players get it within 347 kills, 1,151 kills covers 90%, and 2,301 kills covers 99% — so going past 500 kills without one is unlucky, but not unusual.
Loot values use live Grand Exchange prices and shift with the market.
Loot from 500 kills
| Item | Quantity | Price (ea) | Total value |
|---|---|---|---|
| Total loot value | — | ||