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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 55,677, which is a profit/loss of Coins 1000 -16,612 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Calquat tree seed 5 Calquat tree seed 1 2 Common [1] 12,876
Papaya tree seed 5 Papaya tree seed 1 2 Common [1] 50,452
Palm tree seed 5 Palm tree seed 1 2 Common [1] 117,598
  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 81,093, which is a profit/loss of Coins 1000 8,804 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Herb seed 5 Lantadyme seed 2 1 Always 64,892
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is Coins 1000 31,849, which is a profit/loss of Coins 1000 -40,440 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Grimy torstol Grimy torstol 2 1 Always 15,648
Possibility 4 - RunesEdit

The expected value of Possibility 4 is Coins 1000 108,851, which is a profit/loss of Coins 1000 36,562 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Law rune Law rune 50 1 Always 19,250
Chaos rune Chaos rune 50 1 Always 2,250
Cosmic rune Cosmic rune 50 1 Always 15,300
Death rune Death rune 50 1 Always 11,050
Nature rune Nature rune 50 1 Always 14,600
Body rune Body rune 200 1 Always 6,000
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 4,600
Fire rune Fire rune 200 1 Always 9,200
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is Coins 1000 71,401, which is a profit/loss of Coins 250 -888 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Iron ore Iron ore 200 (noted) 1 Always 55,200
Possibility 6 - CoalEdit

The expected value of Possibility 6 is Coins 1000 53,551, which is a profit/loss of Coins 1000 -18,738 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Coal Coal 150 (noted) 1 Always 37,350
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is Coins 1000 57,931, which is a profit/loss of Coins 1000 -14,358 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune bar Rune bar 3 1 Always 41,730
Possibility 8 - GemsEdit

The expected value of Possibility 8 is Coins 1000 43,639, which is a profit/loss of Coins 1000 -28,650 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Uncut diamond Uncut diamond 3 1 Always 17,415
Uncut ruby Uncut ruby 3 1 Always 10,023
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is Coins 1000 63,439, which is a profit/loss of Coins 1000 -8,850 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Loop half of a key Loop half of a key 1 1 Always 32,238
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 70,591, which is a profit/loss of Coins 1000 -1,698 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Tooth half of a key Tooth half of a key 1 1 Always 39,390
Coins 1000 Coins 15,000 1 Always Not sold
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is Coins 1000 54,191, which is a profit/loss of Coins 1000 -18,098 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune platebody Rune platebody 1 1 Always 37,990
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is Coins 1000 53,609 for male characters and Coins 1000 53,453 for female characters, which is a profit/loss of Coins 1000 -18,680 for male characters and Coins 1000 -18,836 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune platelegs Rune platelegs 1 2 Common [1] 37,408
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,252
  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 24,789,629, which is a profit/loss of Coins 1000 24,717,340 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 16,201
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 60,536, which is a profit/loss of Coins 1000 -11,753 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Grimy lantadyme Grimy lantadyme 5 1 Always 44,335
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 16,201
Yew seed 5 Yew seed 1 2 Common 67,462
Papaya tree seed 5 Papaya tree seed 1 2 Common 50,452
Elder seed 5 Elder seed 1 3 Uncommon 83,886
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is Coins 1000 55,591, which is a profit/loss of Coins 1000 -16,698 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Tooth half of a key Tooth half of a key 1 1 Always 39,390
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 48,439, which is a profit/loss of Coins 1000 -23,850 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Loop half of a key Loop half of a key 1 1 Always 32,238
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 16,201
Herb seed 5 Dwarf weed seed 1 2 Common 39,689
Herb seed 5 Torstol seed 2 2 Common 56,594
Possibility 6 - OresEdit

The expected value of Possibility 6 is Coins 1000 54,441, which is a profit/loss of Coins 1000 -17,848 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Coal Coal 80 (noted) 1 Always 19,920
Adamantite ore Adamantite ore 10 (noted) 1 Always 18,320
Corrupted ore Corrupted ore 50 1 Always Not sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is Coins 1000 91,531, which is a profit/loss of Coins 1000 19,242 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune halberd Rune halberd 1 1 Always 75,330
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is Coins 1000 67,833, which is a profit/loss of Coins 1000 -4,456 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune full helm Rune full helm 1 1 Always 20,029
Rune kiteshield Rune kiteshield 1 1 Always 31,603
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is Coins 1000 53,609 for male characters and Coins 1000 53,453 for female characters, which is a profit/loss of Coins 1000 -18,680 for male characters and Coins 1000 -18,836 for female characters, if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune platelegs Rune platelegs 1 2 Common [1] 37,408
Rune plateskirt Rune plateskirt 1 2 Common [1] 37,252
  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 57,931, which is a profit/loss of Coins 1000 -14,358 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Rune bar Rune bar 3 1 Always 41,730
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is Coins 1000 75,446, which is a profit/loss of Coins 1000 3,157 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Fire talisman Fire talisman 5 (noted) 1 Always 26,915
Water talisman Water talisman 2 (noted) 1 Always 32,330
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is Coins 1000 43,639, which is a profit/loss of Coins 1000 -28,650 if buying the crystal key on the GE.

  Item Quantity Rarity GE market price
Uncut dragonstone Uncut dragonstone 1 1 Always 16,201
Uncut diamond Uncut diamond 3 1 Always 17,415
Uncut ruby Uncut ruby 3 1 Always 10,023
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is Coins 1000 24,789,629, which is a profit/loss of Coins 1000 24,717,340 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 16,201
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 -11,006. (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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