The blackened heart of the Grotesque Guardians.
613.6k gp
Updated 48s ago
Black tourmaline core is currently trading at 613.6k gp on the Grand Exchange and is down 7.9% over the last 24 hours. Current instant-buy and instant-sell prices are 600.0k gp and 627.1k 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.
Margin: 14.6k gp per flip
Volume: 453 trades / 24h
Buy limit: 5 every 4 hours
Max profit/cycle: 73.0k gp
Verdict: High margin with healthy liquidity
Black Tourmaline Core shows an active flip setup with a margin of +14.6k gp and 453 trades over the last 24 hours.
At the buy limit of 5 every four hours, max profit per cycle is about 73.0k gp — high margin with healthy liquidity.
| Time | Buy avg | Buy vol | Sell avg | Sell vol | Margin |
|---|---|---|---|---|---|
| 49m ago(8/7/2026) | — | – | 623.6k | 2 | – |
| 54m ago(8/7/2026) | 601.3k | 3 | — | – | – |
| 1h ago(8/7/2026) | 608.0k | 3 | — | – | – |
| 1h ago(8/7/2026) | 605.0k |
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| 5 |
| — |
| – |
| – |
| 2h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 2h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 2h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 2h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 2h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 3h ago(8/7/2026) | 625.5k | 2 | — | – | – |
| 3h ago(8/7/2026) | 606.0k | 1 | — | – | – |
| 3h ago(8/7/2026) | 652.0k | 3 | — | – | – |
2.6k gp