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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 54,774, which is a profit/loss of Coins 1000 -16,455 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Calquat tree seed 5 Calquat tree seed 1 2 Common [1] 12,144
Papaya tree seed 5 Papaya tree seed 1 2 Common [1] 50,899
Palm tree seed 5 Palm tree seed 1 2 Common [1] 123,478
  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 76,881, which is a profit/loss of Coins 1000 5,652 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Herb seed 5 Lantadyme seed 2 1 Always 61,988
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is Coins 1000 29,999, which is a profit/loss of Coins 1000 -41,230 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Grimy torstol Grimy torstol 2 1 Always 15,106
Possibility 4 - RunesEdit

The expected value of Possibility 4 is Coins 1000 106,643, which is a profit/loss of Coins 1000 35,414 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Law rune Law rune 50 1 Always 19,550
Chaos rune Chaos rune 50 1 Always 2,200
Cosmic rune Cosmic rune 50 1 Always 13,800
Death rune Death rune 50 1 Always 11,100
Nature rune Nature rune 50 1 Always 14,500
Body rune Body rune 200 1 Always 6,800
Mind rune Mind rune 200 1 Always 1,600
Earth rune Earth rune 200 1 Always 3,200
Air rune Air rune 200 1 Always 5,600
Water rune Water rune 200 1 Always 4,400
Fire rune Fire rune 200 1 Always 9,000
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is Coins 1000 70,293, which is a profit/loss of Coins 250 -936 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Iron ore Iron ore 200 (noted) 1 Always 55,400
Possibility 6 - CoalEdit

The expected value of Possibility 6 is Coins 1000 52,843, which is a profit/loss of Coins 1000 -18,386 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Coal Coal 150 (noted) 1 Always 37,950
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is Coins 1000 57,958, which is a profit/loss of Coins 1000 -13,271 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune bar Rune bar 3 1 Always 43,065
Possibility 8 - GemsEdit

The expected value of Possibility 8 is Coins 1000 42,070, which is a profit/loss of Coins 1000 -29,159 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Uncut diamond Uncut diamond 3 1 Always 16,965
Uncut ruby Uncut ruby 3 1 Always 10,212
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is Coins 1000 60,489, which is a profit/loss of Coins 1000 -10,740 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Loop half of a key Loop half of a key 1 1 Always 30,596
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 66,084, which is a profit/loss of Coins 1000 -5,145 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Tooth half of a key Tooth half of a key 1 1 Always 36,191
Coins 1000 Coins 15,000 1 Always Not sold
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is Coins 1000 52,338, which is a profit/loss of Coins 1000 -18,891 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune platebody Rune platebody 1 1 Always 37,445
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is Coins 1000 51,972 for male characters and Coins 1000 52,294 for female characters, which is a profit/loss of Coins 1000 -19,257 for male characters and Coins 1000 -18,935 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune platelegs Rune platelegs 1 2 Common [1] 37,079
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,401
  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 24,788,321, which is a profit/loss of Coins 1000 24,717,092 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 14,893
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] 26,343,729
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 59,728, which is a profit/loss of Coins 1000 -11,501 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Grimy lantadyme Grimy lantadyme 5 1 Always 44,835
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 14,893
Yew seed 5 Yew seed 1 2 Common 66,308
Papaya tree seed 5 Papaya tree seed 1 2 Common 50,899
Elder seed 5 Elder seed 1 3 Uncommon 81,103
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is Coins 1000 51,084, which is a profit/loss of Coins 1000 -20,145 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Tooth half of a key Tooth half of a key 1 1 Always 36,191
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 45,489, which is a profit/loss of Coins 1000 -25,740 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Loop half of a key Loop half of a key 1 1 Always 30,596
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 14,893
Herb seed 5 Dwarf weed seed 1 2 Common 37,873
Herb seed 5 Torstol seed 2 2 Common 53,994
Possibility 6 - OresEdit

The expected value of Possibility 6 is Coins 1000 52,673, which is a profit/loss of Coins 1000 -18,556 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Coal Coal 80 (noted) 1 Always 20,240
Adamantite ore Adamantite ore 10 (noted) 1 Always 17,540
Corrupted ore Corrupted ore 50 1 Always Not sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is Coins 1000 89,216, which is a profit/loss of Coins 1000 17,987 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune halberd Rune halberd 1 1 Always 74,323
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is Coins 1000 66,462, which is a profit/loss of Coins 1000 -4,767 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune full helm Rune full helm 1 1 Always 19,945
Rune kiteshield Rune kiteshield 1 1 Always 31,624
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is Coins 1000 51,972 for male characters and Coins 1000 52,294 for female characters, which is a profit/loss of Coins 1000 -19,257 for male characters and Coins 1000 -18,935 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune platelegs Rune platelegs 1 2 Common [1] 37,079
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,401
  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 57,958, which is a profit/loss of Coins 1000 -13,271 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Rune bar Rune bar 3 1 Always 43,065
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is Coins 1000 76,644, which is a profit/loss of Coins 1000 5,415 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Fire talisman Fire talisman 5 (noted) 1 Always 28,565
Water talisman Water talisman 2 (noted) 1 Always 33,186
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is Coins 1000 42,070, which is a profit/loss of Coins 1000 -29,159 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 14,893
Uncut diamond Uncut diamond 3 1 Always 16,965
Uncut ruby Uncut ruby 3 1 Always 10,212
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is Coins 1000 24,788,321, which is a profit/loss of Coins 1000 24,717,092 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 14,893
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] 26,343,729
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 -11,817. (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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