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About Pyrophosphite
"A phosphate rich mineral dust."
Pyrophosphite is a stackable Fossil Island mineral used together with calcite at the mycelium pool to recalcify cleaned fossils into enriched bones for Prayer training at the Strange Machine in the House on the Hill. It drops from Fossil Island monsters such as Ancient zygomites, Ammonite Crabs, and Wyverns, can be mined at the Volcanic Mine (50 Mining), and is sold by Petrified Pete for 70 Numulites each. With a buy limit of 13,000 it tracks Prayer-training demand from Fossil Island bone enrichment routines.
Item Details
Item ID21545
MembersYes
Store Value30gp
High Alch18gp
Low Alch12gp
GE Limit13,000 / 4h
Item Information
Released2017-09-07
Weight0 kg
TradeableYes
StackableYes
NoteableNo
EquipableNo
Quest itemNo
AlchableYes
DestroyDrop
OptionsDrop
Drop Sources
| Source | Combat | Qty | Rate | Rarity |
|---|---|---|---|---|
| Volcanic Mine | — | 1-4 | — | 1/20 per ore |
| Ancient Zygomite | — | 1 | — | Common |
| Ammonite Crab | — | 1 | — | Uncommon |
| Wyvern (Fossil Island) | — | 1 | — | Uncommon |
Shops (1)
| Shop | Location | Stock | Price | World |
|---|---|---|---|---|
| Petrified Pete's Ore Shop | Fossil Island | 0 | 70 gp | F2P |
History (1)
- 2017-09-07
Added with the Fossil Island expansion as a recalcification component.
Market Strategy
- Prayer XP meta swings dictate pyrophosphite demand more than supply
- Volcanic Mine activity caps the natural supply faucet
- Petrified Pete's Numulite floor sets a soft price ceiling at high Numulite rates
- Bulk Prayer trainers stockpile thousands before major XP events
Trading Tips
Stack with calcite buys in 1:1 ratios for fossil recalcification flips
Watch DMM and league events that surge Prayer training demand
Pull Volcanic Mine clans' supply timing from forum drops to time buys