The blackened heart of the Grotesque Guardians.
563.9k gp
Updated 2m ago
Black tourmaline core is currently trading at 563.9k gp on the Grand Exchange and is down 16.5% over the last 24 hours. Current instant-buy and instant-sell prices are 531.3k gp and 596.6k 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: 53.4k gp per flip
Volume: 453 trades / 24h
Buy limit: 5 every 4 hours
Max profit/cycle: 266.9k gp
Verdict: High margin with healthy liquidity
Black Tourmaline Core shows an active flip setup with a margin of +53.4k gp and 453 trades over the last 24 hours.
At the buy limit of 5 every four hours, max profit per cycle is about 266.9k gp — high margin with healthy liquidity.
| Time | Buy avg | Buy vol | Sell avg | Sell vol | Margin |
|---|---|---|---|---|---|
| 18m ago(8/8/2026) | 531.3k | 2 | — | – | – |
| 38m ago(8/8/2026) | 528.7k | 1 | — | – | – |
| 1h ago(8/7/2026) | 551.0k | 1 | 570.0k | 1 | 19.0k |
| 1h ago(8/7/2026) | 551.0k |
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| 1 |
| — |
| – |
| – |
| 1h ago(8/7/2026) | 568.6k | 2 | — | – | – |
| 1h ago(8/7/2026) | 528.7k | 2 | — | – | – |
| 1h ago(8/7/2026) | — | – | 550.0k | 1 | – |
| 1h ago(8/7/2026) | 525.0k | 2 | — | – | – |
| 2h ago(8/7/2026) | 501.6k | 2 | — | – | – |
| 2h ago(8/7/2026) | 613.0k | 2 | 615.0k | 1 | 2.0k |
| 2h ago(8/7/2026) | — | – | 615.0k | 2 | – |
| 2h ago(8/7/2026) | — | – | 615.0k | 2 | – |
| 2h ago(8/7/2026) | 611.0k | 1 | — | – | – |
| 2h ago(8/7/2026) | — | – | 600.5k | 4 | – |
| 3h ago(8/7/2026) | 600.0k | 1 | — | – | – |
| 3h ago(8/7/2026) | — | – | 623.6k | 2 | – |
| 4h ago(8/7/2026) | 601.3k | 3 | — | – | – |
| 4h ago(8/7/2026) | 608.0k | 3 | — | – | – |
| 4h ago(8/7/2026) | 605.0k | 5 | — | – | – |
| 5h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 5h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 5h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 5h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 6h ago(8/7/2026) | 625.5k | 2 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 1 | — | – | – |
| 6h ago(8/7/2026) | 652.0k | 3 | — | – | – |
| 6h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 7h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 7h ago(8/7/2026) | 604.0k | 1 | 640.9k | 2 | 37.0k |
| 8h ago(8/7/2026) | 604.0k | 1 | — | – | – |
| 8h ago(8/7/2026) | 604.0k | 1 | — | – | – |
| 8h ago(8/7/2026) | 604.0k | 2 | — | – | – |
| 9h ago(8/7/2026) | 600.0k | 1 | — | – | – |
| 10h ago(8/7/2026) | 675.0k | 2 | — | – | – |
| 10h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 10h ago(8/7/2026) | — | – | 694.9k | 1 | – |
| 10h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 11h ago(8/7/2026) | — | – | 660.1k | 1 | – |
| 12h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 12h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 12h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 13h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 13h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 13h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 14h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 14h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 15h ago(8/7/2026) | 696.0k | 1 | — | – | – |
2.4k gp