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Classic Runestone
This article is about the low-value, tradeable item found primarily while fishing. For the item that was previously called Casket, used in Treasure Trails, see Scroll box. For Treasure Trail reward caskets, see Casket (disambiguation)
Release date 27 February 2002 (Update)
Members? Yes
Quest item? No
Tradeable? Yes
Equipable? No
Stackable? No
High Alch 30 coins
Low Alch 20 coins
Destroy Drop
Store price Not sold
Exchange price 4,082 coins (info)
Buy limit 100
Examine I hope there's treasure in it.
Weight 5 kg
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Casket detail

A Casket is a wooden chest obtained primarily by big net fishing, or as drops from certain monsters. Caskets can be opened, and may contain various items, including Half keys and talismans.

Methods of obtaining casketsEdit


These caskets (found via the above methods) may contain any of the following items:

  Item Quantity Rarity GE market price
Coins 1000 Coins 8–3,000 2 Common Not sold
Uncut sapphire Uncut sapphire 1 2 Common 1,353
Uncut emerald Uncut emerald 1 3 Uncommon 2,509
Uncut ruby Uncut ruby 1 3 Uncommon 2,766
Uncut diamond Uncut diamond 1 4 Rare 5,242
Loop half of a key Loop half of a key 1 4 Rare 31,242
Tooth half of a key Tooth half of a key 1 4 Rare 32,820
Cosmic talisman Cosmic talisman 1 2 Common 790
Chaos talisman Chaos talisman 1 3 Uncommon 684
Nature talisman Nature talisman 1 4 Rare 486
Court summons Court summons 1 3 Uncommon Not sold

Dropping monsters Edit

Levels 1 to 100 Edit

Monster Combat level Quantity Rarity
Giant lobster 58; 100 1 Rare
Rock Crab 78 1 Rare
Hobgoblin 44; 50 1 Very rare
Sea snake hatchling 90 1 Common
Sea snake young 90 1 Rare
Giant Sea Snake 90 1 Uncommon

Levels 101+ Edit

Monster Combat level Quantity Rarity
Dagannoth (Chaos Tunnels) 112; 114 1 Uncommon
Dagannoth (Lighthouse) 110; 112 1 Uncommon
Dagannoth (Waterbirth Island) 112 1 Rare
Mummy 106; 110 1 Rare
Giant Rock Crab 136 1 Rare


These are the results from opening 500 caskets.

Item Probability GE price
20 Coins 5.6% 20
40 Coins 8.4% 40
80 Coins 9.2% 80
160 Coins 5.8% 160
320 Coins 5.2% 320
640 Coins 10.4% 640
Uncut Sapphire 23.8% 1353
Uncut Emerald 12% 2509
Uncut Ruby 7% 2766
Uncut Diamond 2.6% 5242
Cosmic Talisman 8.6% 1353
Loop half of a key 0.8% 31242
Tooth half of a key 0.6% 32820

This makes the expected value of any one chest 1402.2gp, taking into account both probability and value of contents.

Other casketsEdit

You used to receive an item named 'Casket' upon completion of a Treasure Trails clue, although this was a separate, untradeable item and has since been changed. Clues now usually give a scroll box instead, except for the final clue in a trail, which gives a reward casket named 'Casket ([difficulty of clue scroll])'. For articles on Treasure Trail Reward Caskets, see Casket (disambiguation).

During the quest Pirate's Treasure, you will receive a casket unique to the quest.


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