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TaverleyPrifddinas
Crystal chest
Crystal chest
Release date 27 February 2002 (Update)
Members Yes
Quest No
Location Taverley
Examine A crystal key can open it.
Crystal chest location
[view][talk]
Crystal chest
Crystal chest (Prifddinas)
Release date 22 September 2014 (Update)
Members Yes
Quest Plague's End
Location Prifddinas
Examine A crystal key can open it.
Crystal chest (Prifddinas) location
[view][talk]

The crystal key chest is a treasure chest located in Ivy Sophista's house in Taverley. A second chest is located in Prifddinas in the Iorwerth Clan district. The chests are locked and can only be opened by a crystal key. Attempting to open the chest without the crystal key yields the message: "This chest is securely locked shut." The crystal key is made up of a loop half of a key and a tooth half of a key; you can make the crystal key by using them with each other, or selecting the "Assemble" option.

Opening a crystal chest grants a variety of rewards, which always include an uncut dragonstone. The crystal chest in Prifddinas grants slightly better rewards than the Taverley chest. The crystal key sells for more than most of the rewards, making it generally more profitable to sell the key than to use it. The key is used once and disappears upon usage.

Rewards possibilitiesEdit

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.

Taverley chestEdit

Possibility 1 - Fruit tree seedEdit

The expected value of Possibility 1 is 54,085, which is a profit/loss of 13,693 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Calquat tree seed 5Calquat tree seed1Common[1]4,958
Papaya tree seed 5Papaya tree seed1Common[1]52,172
Palm tree seed 5Palm tree seed1Uncommon[1]179,868
  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 14,009, which is a profit/loss of -26,383 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Lantadyme seed 5Lantadyme seed2Always2,244
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 20,487, which is a profit/loss of -19,905 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Grimy torstolGrimy torstol2Always8,722
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 132,315, which is a profit/loss of 91,923 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Law runeLaw rune50Always18,100
Chaos runeChaos rune50Always5,550
Cosmic runeCosmic rune50Always15,500
Death runeDeath rune50Always8,400
Nature runeNature rune50Always22,000
Body runeBody rune200Always7,400
Mind runeMind rune200Always4,000
Earth runeEarth rune200Always5,000
Air runeAir rune200Always9,000
Water runeWater rune200Always6,200
Fire runeFire rune200Always19,400
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 58,765, which is a profit/loss of 18,373 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Iron oreIron ore200 (noted)Always47,000
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 36,965, which is a profit/loss of -3,427 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
CoalCoal150 (noted)Always25,200
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 52,967, which is a profit/loss of 12,575 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune barRune bar3Always41,202
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 31,421, which is a profit/loss of -8,971 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Uncut diamondUncut diamond3Always12,501
Uncut rubyUncut ruby3Always7,155
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 46,462, which is a profit/loss of 6,070 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Loop half of a keyLoop half of a key1Always19,697
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 49,957, which is a profit/loss of 9,565 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Tooth half of a keyTooth half of a key1Always23,192
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 49,071, which is a profit/loss of 8,679 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune platebodyRune platebody1Always37,306
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 48,439 for male characters and 48,471 for female characters, which is a profit/loss of 8,047 for male characters and 8,079 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune platelegsRune platelegs1Common[1]36,674
Rune plateskirtRune plateskirt1Common[1]36,706
  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 5,347,557, which is a profit/loss of 5,307,165 if buying the crystal key on the GE.

Receiving this possibility is very rare, at a rate of 1/6801.[1]
Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Dragonstone helmDragonstone helm1Very rare[2]4,266,970
Dragonstone hauberkDragonstone hauberk1Very rare[2]9,758,746
Dragonstone greavesDragonstone greaves1Very rare[2]4,706,609
Dragonstone gauntletsDragonstone gauntlets1Very rare[2]3,891,029
Dragonstone bootsDragonstone boots1Very rare[2]4,055,606
  1. ^ https://twitter.com/JagexTimbo/status/557600452150579200
  2. ^ 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.

Prifddinas chestEdit

This chest was released with the first part 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 1 - Tree seedsEdit

The expected value of Possibility 1 is 81,296.6, which is a profit/loss of 40,904.6 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Yew seed 5Yew seed1Common45,668
Papaya tree seed 5Papaya tree seed1Common52,172
Elder seed 5Elder seed1Uncommon151,978
Possibility 2 - Herb seedsEdit

The expected value of Possibility 2 is 18,925, which is a profit/loss of -21,467 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Dwarf weed seed 5Dwarf weed seed1Common1,292
Torstol seed 5Torstol seed2Common5,868
Possibility 3Edit

The expected value of Possibility 3 is 30,735, which is a profit/loss of -9,657 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Grimy lantadymeGrimy lantadyme5Always18,970
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 4 - TalismansEdit

The expected value of Possibility 4 is 28,956, which is a profit/loss of -11,436 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Fire talismanFire talisman(noted)Always6,525
Water talismanWater talisman(noted)Always10,666
Possibility 5 - Rune HalberdEdit

The expected value of Possibility 5 is 87,745, which is a profit/loss of 47,353 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune halberdRune halberd1Always75,980
Possibility 6 - OresEdit

The expected value of Possibility 6 is 35,515, which is a profit/loss of -4,877 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
CoalCoal80 (noted)Always13,440
Adamantite oreAdamantite ore10 (noted)Always10,310
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 52,967, which is a profit/loss of 12,575 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune barRune bar3Always41,202
Possibility 8 - Uncut gemsEdit

The expected value of Possibility 8 is 31,421, which is a profit/loss of -8,971 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Uncut diamondUncut diamond3Always12,501
Uncut rubyUncut ruby3Always7,155
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 31,462, which is a profit/loss of -8,930 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Loop half of a keyLoop half of a key1Always19,697
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 34,957, which is a profit/loss of -5,435 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Tooth half of a keyTooth half of a key1Always23,192
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 11 - Rune armourEdit

The expected value of Possibility 11 is 62,145, which is a profit/loss of 21,753 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune full helmRune full helm1Always19,454
Rune kiteshieldRune kiteshield1Always30,926
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 48,439 for male characters and 48,471 for female characters, which is a profit/loss of 8,047 for male characters and 8,079 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Rune platelegsRune platelegs1Common[1]36,674
Rune plateskirtRune plateskirt1Common[1]36,706
  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 5,347,557, which is a profit/loss of 5,307,165 if buying the crystal key on the GE.

Receiving this possibility is very rare, at a rate of 1/6801.[1]
Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,765
Dragonstone helmDragonstone helm1Very rare[2]4,266,970
Dragonstone hauberkDragonstone hauberk1Very rare[2]9,758,746
Dragonstone greavesDragonstone greaves1Very rare[2]4,706,609
Dragonstone gauntletsDragonstone gauntlets1Very rare[2]3,891,029
Dragonstone bootsDragonstone boots1Very rare[2]4,055,606
  1. ^ https://twitter.com/JagexTimbo/status/557600452150579200
  2. ^ 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.

ProbabilitiesEdit

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 official 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 7,298. 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.

TriviaEdit

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