The blackened heart of the Grotesque Guardians.
594.0k gp
Updated 10m ago
Black tourmaline core is currently trading at 594.0k gp on the Grand Exchange and is down 10.8% over the last 24 hours. Current instant-buy and instant-sell prices are 598.0k gp and 590.0k gp.
Category: ores · Members only · View on OSRS Wiki
🔔 many users are watching this item
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: -19,800 gp per flip
Volume: 453 trades / 24h
Buy limit: 5 every 4 hours
Max profit/cycle: -99,000 gp
Verdict: High margin, low liquidity
Black Tourmaline Core currently has a flip margin of −19.8k gp, which isn't profitable to flip right now despite 453 trades over the last 24 hours.
Items with negative or zero margins like this are better watched than actively flipped until the spread widens.
| Time | Buy avg | Buy vol | Sell avg | Sell vol | Margin |
|---|---|---|---|---|---|
| 13m ago(8/8/2026) | 598.0k | 1 | — | – | – |
| 23m ago(8/8/2026) | 598.0k | 1 | — | – | – |
| 28m ago(8/8/2026) | 610.0k | 6 | — | – | – |
| 33m ago(8/8/2026) | 610.0k |
Set a price alert
Get notified when this item hits your target.
| 2 |
| — |
| – |
| – |
| 43m ago(8/8/2026) | — | – | 590.0k | 2 | – |
| 48m ago(8/8/2026) | 528.7k | 1 | — | – | – |
| 53m ago(8/8/2026) | 528.7k | 1 | — | – | – |
| 58m ago(8/8/2026) | 600.0k | 1 | — | – | – |
| 1h ago(8/8/2026) | 600.0k | 1 | — | – | – |
| 1h ago(8/8/2026) | 600.0k | 1 | 598.3k | 2 | 0 |
| 1h ago(8/8/2026) | 531.3k | 2 | — | – | – |
| 1h ago(8/8/2026) | 528.7k | 1 | — | – | – |
| 2h ago(8/7/2026) | 551.0k | 1 | 570.0k | 1 | 19.0k |
| 2h ago(8/7/2026) | 551.0k | 1 | — | – | – |
| 2h ago(8/7/2026) | 568.6k | 2 | — | – | – |
| 2h ago(8/7/2026) | 528.7k | 2 | — | – | – |
| 3h ago(8/7/2026) | — | – | 550.0k | 1 | – |
| 3h ago(8/7/2026) | 525.0k | 2 | — | – | – |
| 3h ago(8/7/2026) | 501.6k | 2 | — | – | – |
| 3h ago(8/7/2026) | 613.0k | 2 | 615.0k | 1 | 2.0k |
| 3h ago(8/7/2026) | — | – | 615.0k | 2 | – |
| 3h ago(8/7/2026) | — | – | 615.0k | 2 | – |
| 3h ago(8/7/2026) | 611.0k | 1 | — | – | – |
| 4h ago(8/7/2026) | — | – | 600.5k | 4 | – |
| 4h ago(8/7/2026) | 600.0k | 1 | — | – | – |
| 5h ago(8/7/2026) | — | – | 623.6k | 2 | – |
| 5h ago(8/7/2026) | 601.3k | 3 | — | – | – |
| 5h ago(8/7/2026) | 608.0k | 3 | — | – | – |
| 6h ago(8/7/2026) | 605.0k | 5 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 6h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 7h ago(8/7/2026) | 606.0k | 2 | — | – | – |
| 7h ago(8/7/2026) | 625.5k | 2 | — | – | – |
| 7h ago(8/7/2026) | 606.0k | 1 | — | – | – |
| 8h ago(8/7/2026) | 652.0k | 3 | — | – | – |
| 8h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 8h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 9h ago(8/7/2026) | 604.0k | 1 | 640.9k | 2 | 37.0k |
| 9h ago(8/7/2026) | 604.0k | 1 | — | – | – |
| 9h ago(8/7/2026) | 604.0k | 1 | — | – | – |
| 10h ago(8/7/2026) | 604.0k | 2 | — | – | – |
| 10h ago(8/7/2026) | 600.0k | 1 | — | – | – |
| 11h ago(8/7/2026) | 675.0k | 2 | — | – | – |
| 11h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 11h ago(8/7/2026) | — | – | 694.9k | 1 | – |
| 12h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 12h ago(8/7/2026) | — | – | 660.1k | 1 | – |
| 13h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 13h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 13h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 14h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 14h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 15h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 15h ago(8/7/2026) | 675.0k | 1 | — | – | – |
| 16h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 16h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 17h ago(8/7/2026) | 696.0k | 1 | — | – | – |
| 18h ago(8/7/2026) | 696.0k | 2 | — | – | – |
2.4k gp