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Crystal chest

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The crystal key chest is a treasure chest in Taverley that is famous for containing uncut dragonstones, among other things. The chest, located in Ivy Sophista's house, is locked and can only be opened by a crystal key. The crystal key is made up of a loop half of a key and the tooth half of a key; you can make the crystal key by using them with each other, or selecting the "Assemble" option. The crystal key sells for more than most of the rewards, making it more monetarily satisfying to sell the key. When the key is used it disappears, so opening the chest is a gamble.

There is another chest located in Prifddinas in the Iorwerth section. This chest has slightly improved rewards over the chest in Taverley.

Attempting to open the chest without the crystal key yields the message: "This chest is securely locked shut."

RewardsEdit

The chest loot always includes an uncut dragonstone, together with a random reward generated from 13 possible reward tables. Below are the values of the chest's contents, based on current Grand Exchange prices.

After an update, wearing a ring of wealth will increase your chances of getting a better drop. It is only possible to obtain rune platelegs if you are a male character, and a rune plateskirt if you are female character.

It is a common misconception that you can obtain a Crystal ward or a crystal bow from the chest. The chest does not contain either of these items, as they are a quest reward.

Possibilities - Taverley chestEdit

Possibility 1 - Fruit tree seedEdit

The expected value of Possibility 1 is Coins 1000 57,046, which is a profit/loss of Coins 1000 -21,916 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Calquat tree seed 5 Calquat tree seed 1 2 Common [1] 13,458
Papaya tree seed 5 Papaya tree seed 1 2 Common [1] 54,657
Palm tree seed 5 Palm tree seed 1 2 Common [1] 110,250
  1. ^ a b c With Possibility 1, you are guaranteed to get either a calquat tree seed, a papaya tree seed or a palm tree seed. Both the calquat and papaya tree seed have a probability of 5:11 (45.45%), and the palm tree seed has a probability of 1:11 (9%).
Possibility 2 - Lantadyme seedsEdit

The expected value of Possibility 2 is Coins 1000 91,412, which is a profit/loss of Coins 1000 12,450 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Herb seed 5 Lantadyme seed 2 1 Always 75,350
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is Coins 1000 32,900, which is a profit/loss of Coins 1000 -46,062 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Grimy torstol Grimy torstol 2 1 Always 16,838
Possibility 4 - RunesEdit

The expected value of Possibility 4 is Coins 1000 115,162, which is a profit/loss of Coins 1000 36,200 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Law rune Law rune 50 1 Always 21,650
Chaos rune Chaos rune 50 1 Always 2,200
Cosmic rune Cosmic rune 50 1 Always 16,500
Death rune Death rune 50 1 Always 13,150
Nature rune Nature rune 50 1 Always 14,400
Body rune Body rune 200 1 Always 5,600
Mind rune Mind rune 200 1 Always 1,600
Earth rune Earth rune 200 1 Always 3,400
Air rune Air rune 200 1 Always 5,400
Water rune Water rune 200 1 Always 5,000
Fire rune Fire rune 200 1 Always 10,200
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is Coins 1000 73,062, which is a profit/loss of Coins 1000 -5,900 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Iron ore Iron ore 200 (noted) 1 Always 57,000
Possibility 6 - CoalEdit

The expected value of Possibility 6 is Coins 1000 53,712, which is a profit/loss of Coins 1000 -25,250 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Coal Coal 150 (noted) 1 Always 37,650
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is Coins 1000 57,789, which is a profit/loss of Coins 1000 -21,173 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune bar Rune bar 3 1 Always 41,727
Possibility 8 - GemsEdit

The expected value of Possibility 8 is Coins 1000 44,130, which is a profit/loss of Coins 1000 -34,832 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Uncut diamond Uncut diamond 3 1 Always 17,730
Uncut ruby Uncut ruby 3 1 Always 10,338
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is Coins 1000 65,065, which is a profit/loss of Coins 1000 -13,897 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Loop half of a key Loop half of a key 1 1 Always 34,003
Coins 1000 Coins 15,000 1 Always Not sold
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is Coins 1000 74,092, which is a profit/loss of Coins 1000 -4,870 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Tooth half of a key Tooth half of a key 1 1 Always 43,030
Coins 1000 Coins 15,000 1 Always Not sold
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is Coins 1000 54,277, which is a profit/loss of Coins 1000 -24,685 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune platebody Rune platebody 1 1 Always 38,215
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is Coins 1000 53,485 for male characters and Coins 1000 53,628 for female characters, which is a profit/loss of Coins 1000 -25,477 for male characters and Coins 1000 -25,334 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune platelegs Rune platelegs 1 2 Common [1] 37,423
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,566
  1. ^ a b With Possibility 12, you are guaranteed to get either a rune platelegs or rune plateskirt. Male characters will always receive a rune platelegs, while female characters will always receive a rune plateskirt.
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is Coins 1000 25,059,395, which is a profit/loss of Coins 1000 24,980,433 if buying the crystal key on the GE.

Receiving this possibility is very rare.
  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Dragonstone helm Dragonstone helm 1 2 Common [1] 18,490,877
Dragonstone hauberk Dragonstone hauberk 1 2 Common [1] 44,560,373
Dragonstone greaves Dragonstone greaves 1 2 Common [1] 27,693,252
Dragonstone gauntlets Dragonstone gauntlets 1 2 Common [1] 17,116,490
Dragonstone boots Dragonstone boots 1 2 Common [1] 17,355,673
  1. ^ a b c d e With Possibility 13, you are guaranteed to get exactly one piece of dragonstone armour. Each piece has the same probability of being received.

Possibilities - Prifddinas chestEdit

Priffdinas chest

Priffdinas chest location.

This chest was released with part 1 of Prifddinas on 22 September 2014 and is located in the Iorwerth Manor against the south wall. It has an improved drop table over the chest in Taverley. While the Voice of Seren is active for the Iorwerth clan, the chest provides an increased chance of Prifddinas-related items looted, including: corrupted ore, Crystal tree blossoms, and Crystal motherlode shards. At the least, the player should still wear a Ring of wealth when opening either crystal chest.

Possibility 1Edit

The expected value of Possibility 1 is Coins 1000 61,297, which is a profit/loss of Coins 1000 -17,665 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Grimy lantadyme Grimy lantadyme 5 1 Always 45,235
Crystal tree blossom Crystal tree blossom 1 1 Always Not sold
Possibility 2 - Tree seedsEdit
  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Yew seed 5 Yew seed 1 2 Common 67,887
Papaya tree seed 5 Papaya tree seed 1 2 Common 54,657
Elder seed 5 Elder seed 1 3 Uncommon 85,960
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is Coins 1000 59,092, which is a profit/loss of Coins 1000 -19,870 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Tooth half of a key Tooth half of a key 1 1 Always 43,030
Crystal motherlode shard Crystal motherlode shard 10 2 Common Not sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is Coins 1000 50,065, which is a profit/loss of Coins 1000 -28,897 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Loop half of a key Loop half of a key 1 1 Always 34,003
Crystal motherlode shard Crystal motherlode shard 10 2 Common Not sold
Possibility 5 - Herb seedsEdit
  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Herb seed 5 Dwarf weed seed 1 2 Common 43,110
Herb seed 5 Torstol seed 2 2 Common 67,280
Possibility 6 - OresEdit

The expected value of Possibility 6 is Coins 1000 56,112, which is a profit/loss of Coins 1000 -22,850 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Coal Coal 80 (noted) 1 Always 20,080
Adamantite ore Adamantite ore 10 (noted) 1 Always 19,970
Corrupted ore Corrupted ore 50 1 Always Not sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is Coins 1000 91,582, which is a profit/loss of Coins 1000 12,620 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune halberd Rune halberd 1 1 Always 75,520
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is Coins 1000 67,782, which is a profit/loss of Coins 1000 -11,180 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune full helm Rune full helm 1 1 Always 20,140
Rune kiteshield Rune kiteshield 1 1 Always 31,580
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is Coins 1000 53,485 for male characters and Coins 1000 53,628 for female characters, which is a profit/loss of Coins 1000 -25,477 for male characters and Coins 1000 -25,334 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune platelegs Rune platelegs 1 2 Common [1] 37,423
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,566
  1. ^ a b With Possibility 9, you are guaranteed to get either a rune platelegs or rune plateskirt. Male characters will always receive a rune platelegs, while female characters will always receive a rune plateskirt.
Possibility 10 - Rune barsEdit

The expected value of Possibility 10 is Coins 1000 57,789, which is a profit/loss of Coins 1000 -21,173 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Rune bar Rune bar 3 1 Always 41,727
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is Coins 1000 74,116, which is a profit/loss of Coins 1000 -4,846 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Fire talisman Fire talisman 5 (noted) 1 Always 25,710
Water talisman Water talisman 2 (noted) 1 Always 32,344
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is Coins 1000 44,130, which is a profit/loss of Coins 1000 -34,832 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Uncut diamond Uncut diamond 3 1 Always 17,730
Uncut ruby Uncut ruby 3 1 Always 10,338
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is Coins 1000 25,059,395, which is a profit/loss of Coins 1000 24,980,433 if buying the crystal key on the GE.

Receiving this possibility is very rare.
  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,062
Dragonstone helm Dragonstone helm 1 2 Common [1] 18,490,877
Dragonstone hauberk Dragonstone hauberk 1 2 Common [1] 44,560,373
Dragonstone greaves Dragonstone greaves 1 2 Common [1] 27,693,252
Dragonstone gauntlets Dragonstone gauntlets 1 2 Common [1] 17,116,490
Dragonstone boots Dragonstone boots 1 2 Common [1] 17,355,673
  1. ^ a b c d e With Possibility 13, you are guaranteed to get exactly one piece of dragonstone armour. Each piece has the same probability of being received.

Probabilities - Taverley chestEdit

The probabilities in this section are an estimation based on the data of 1134 crystal chest loots on the Taverley chest, while wearing a ring of wealth.
Possibility Percentage
Possibility 1: Fruit tree seed 8.02%[1]
Possibility 2: Lantadyme seeds 9.61%
Possibility 3: Grimy torstols 9.96%
Possibility 4: Runes 7.5%
Possibility 5: Iron ore 8.47%
Possibility 6: Coal 9.17%
Possibility 7: Rune bars 9.61%
Possibility 8: Gems 9.61%
Possibility 9: Loop half of a key 7.94%
Possibility 10: Tooth half of a key 6.61%
Possibility 11: Rune platebody 5.03%
Possibility 12: Rune platelegs or plateskirt 8.47%
Possibility 13: Dragonstone armour < 0.01%
  1. ^ The runescape wiki lists the probability of receiving a calquat or papaya tree seed at 5:11 (45.45%) each and the probability of receiving a palm tree seed at 1:11 (9%). This data shows a probability of 49.45% for the calquat, 47.25% for the papaya, and 3.30% for the palm tree seed.

Using these probabilities, the expected average profit/loss, per crystal key, when looting the crystal chest is Coins 1000 -15,444. (Assuming you will receive whichever of the rune platelegs and rune plateskirt is worth more, and the crystal key is bought at GE price). This is excluding the possibility of receiving a dragonstone armour piece, as this possibility is much too rare to estimate with any acceptable accuracy.

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