Rock-shell chunkmembers
“A spherical chunk of rock-shell.”
About this item
Rock-shell chunks are dropped by Giant Rock Crabs and King Sand Crabs. These are used to make rock-shell helms by giving Skulgrimen 1 dagannoth hide, 5,000, and 1 rock-shell chunk. Creating the helm requires completion of The Fremennik Trials. It can also be exchanged with Askeladden on Waterbirth Island for cooked tuna before The Fremennik Trials or cooked lobster after the quest.
From Rock-shell chunk on the Old School RuneScape Wiki, used under CC BY-NC-SA 3.0.
- Buy limit
- 11,000 per 4h
- High alch
- 36
- Shop value
- 60
- Traded last hour
- 10
Its high alch value of 36 does not cover the 150 nature rune it would burn, so alching is a loss before the item itself is counted.
One unit, right now
- Buy at (instant-sell)traded 52m ago
- 8,500
- Sell at (instant-buy)traded 2d ago
- 8,317
- Spread
- -183
- Tax on the sale
- −166
- Margin per unit
- -349
Breakeven sell price is 8,674 — a spread of 2.05% just to clear the tax.
Your 1.00M
- Buy limit per 4 hours
- 11,000
- Units you can fund
- 117
- Capital required
- 994,500
- Profit per window
- -40,833
Price is stale, governed by the sell side at 2d. You can get in faster than you can get out.
Prices refreshed 3m ago.
Against its own history last 90 days · 76 daily bars
wider than 4% of the last 76 days
69% of the way up its 90-day range
Measured with medians rather than averages, because one spike — an update, a streamer, a brief squeeze — drags an average around for weeks afterwards and makes everything since look ordinary. Worth noting here: this item typically moves 0.02% in a day, which is more than the -2.15% you would be capturing — so holding it overnight risks more than the flip makes.