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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 3,405 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 1000Coins8–3,000CommonNot sold
Uncut sapphireUncut sapphire1Common861
Uncut emeraldUncut emerald1Uncommon1,345
Uncut rubyUncut ruby1Uncommon2,239
Uncut diamondUncut diamond1Rare4,018
Loop half of a keyLoop half of a key1Rare17,058
Tooth half of a keyTooth half of a key1Rare32,030
Cosmic talismanCosmic talisman1Common459
Chaos talismanChaos talisman1Uncommon762
Nature talismanNature talisman1Rare733
Court summonsCourt summons1UncommonNot sold

Dropping monstersEdit

Levels 1 to 100Edit

Monster Combat level Quantity Rarity
Giant lobster58; 1001Rare
Rock Crab781Rare
Hobgoblin44; 501Very rare
Sea snake hatchling901Common
Sea snake young901Rare
Giant Sea Snake901Uncommon

Levels 101+Edit

Monster Combat level Quantity Rarity
Dagannoth (Chaos Tunnels)112; 1141Uncommon
Dagannoth (Lighthouse)110; 1121Uncommon
Dagannoth (Waterbirth Island)1121Rare
Mummy106; 1101Rare
Giant Rock Crab1361Rare


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% 861
Uncut Emerald 12% 1345
Uncut Ruby 7% 2239
Uncut Diamond 2.6% 4018
Cosmic Talisman 8.6% 861
Loop half of a key 0.8% 17058
Tooth half of a key 0.6% 32030

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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