The blackened heart of the Grotesque Guardians.
461.5k gp
Updated 45m ago
Black tourmaline core is currently trading at 461.5k gp on the Grand Exchange and is up 2.6% over the last 24 hours. Current instant-buy and instant-sell prices are 434.0k gp and 489.1k gp.
Category: ores · Members only · View on OSRS Wiki
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Black Tourmaline Core is a members-only item on the OSRS Grand Exchange in the ores category.
In-game examine text: "The blackened heart of the Grotesque Guardians."
It has a Grand Exchange buy limit of 5 every four hours, a high alchemy value of 24.9k gp, and item ID 21730.
| Time | Buy avg | Buy vol | Sell avg | Sell vol | Margin |
|---|---|---|---|---|---|
| 46m ago(9/23/2026) | 434.0k | 1 | — | – | – |
| 1h ago(9/23/2026) | 434.0k | 1 | — | – | – |
| 2h ago(9/23/2026) | 434.0k | 1 | — | – | – |
| 2h ago(9/23/2026) | 436.0k | 1 | — | – | – |
| 3h ago(9/23/2026) | 469.5k | 1 | 489.1k | 1 | 19.5k |
| 3h ago(9/23/2026) | — | – | 455.9k | 2 | – |
| 5h ago(9/23/2026) | 436.0k | 1 | — | – | – |
| 5h ago(9/23/2026) | 436.0k | 1 | — | – | – |
| 5h ago(9/23/2026) | 436.0k | 1 | — | – | – |
| 6h ago(9/23/2026) | — | – | 467.5k | 1 | – |
| 6h ago(9/23/2026) | 469.5k | 1 | — | – | – |
| 7h ago(9/23/2026) | 469.5k | 1 | — | – | – |
Black Tourmaline Core has a Grand Exchange buy limit of 5 every four hours.
Black Tourmaline Core shows an active flip setup with a margin of +45.3k gp and 399 trades over the last 24 hours. At the buy limit of 5 every four hours, max profit per cycle is about 226.4k gp — high margin with healthy liquidity.
Black Tourmaline Core has a high alchemy value of 24.9k gp.
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Margin: 45.3k gp per flip
Volume: 399 trades / 24h
Buy limit: 5 every 4 hours
Max profit/cycle: 226.4k gp
Verdict: High margin with healthy liquidity
Black Tourmaline Core shows an active flip setup with a margin of +45.3k gp and 399 trades over the last 24 hours.
At the buy limit of 5 every four hours, max profit per cycle is about 226.4k gp — high margin with healthy liquidity.
1.9k gp