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Crystal chest

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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 53,456, which is a profit/loss of 9,377 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Calquat tree seed 5Calquat tree seed1Common[1]13,693
Papaya tree seed 5Papaya tree seed1Common[1]44,142
Palm tree seed 5Palm tree seed1Common[1]151,982
  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 14,867, which is a profit/loss of -29,212 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Lantadyme seed 5Lantadyme seed2Always1,516
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 23,071, which is a profit/loss of -21,008 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Grimy torstolGrimy torstol2Always9,720
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 121,701, which is a profit/loss of 77,622 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Law runeLaw rune50Always13,100
Chaos runeChaos rune50Always3,750
Cosmic runeCosmic rune50Always17,950
Death runeDeath rune50Always8,850
Nature runeNature rune50Always19,100
Body runeBody rune200Always8,000
Mind runeMind rune200Always4,400
Earth runeEarth rune200Always2,800
Air runeAir rune200Always8,000
Water runeWater rune200Always3,200
Fire runeFire rune200Always19,200
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 74,951, which is a profit/loss of 30,872 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Iron oreIron ore200 (noted)Always61,600
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 40,201, which is a profit/loss of -3,878 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
CoalCoal150 (noted)Always26,850
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 54,895, which is a profit/loss of 10,816 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune barRune bar3Always41,544
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 37,399, which is a profit/loss of -6,680 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Uncut diamondUncut diamond3Always14,877
Uncut rubyUncut ruby3Always9,171
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 46,730, which is a profit/loss of 2,651 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Loop half of a keyLoop half of a key1Always18,379
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 53,157, which is a profit/loss of 9,078 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Tooth half of a keyTooth half of a key1Always24,806
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 50,764, which is a profit/loss of 6,685 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune platebodyRune platebody1Always37,413
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 49,999 for male characters and 50,297 for female characters, which is a profit/loss of 5,920 for male characters and 6,218 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune platelegsRune platelegs1Common[1]36,648
Rune plateskirtRune plateskirt1Common[1]36,946
  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 4,895,648, which is a profit/loss of 4,851,569 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 dragonstone1Always13,351
Dragonstone helmDragonstone helm1Common[2]3,900,782
Dragonstone hauberkDragonstone hauberk1Common[2]8,813,155
Dragonstone greavesDragonstone greaves1Common[2]4,199,789
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,677,819
Dragonstone bootsDragonstone boots1Common[2]3,819,938
  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 1Edit

The expected value of Possibility 1 is 33,526, which is a profit/loss of -10,553 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Grimy lantadymeGrimy lantadyme5Always20,175
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 2 - Tree seedsEdit

The expected value of Possibility 2 is 286,117, which is a profit/loss of 242,038 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Yew seed 5Yew seed1Common42,041
Papaya tree seed 5Papaya tree seed1Common44,142
Elder seed 5Elder seed1Uncommon186,583
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is 38,157, which is a profit/loss of -5,922 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Tooth half of a keyTooth half of a key1Always24,806
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is 31,730, which is a profit/loss of -12,349 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Loop half of a keyLoop half of a key1Always18,379
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 5 - Herb seedsEdit

The expected value of Possibility 5 is 18,017, which is a profit/loss of -26,062 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Dwarf weed seed 5Dwarf weed seed1Common642
Torstol seed 5Torstol seed2Common4,024
Possibility 6 - OresEdit

The expected value of Possibility 6 is 39,261, which is a profit/loss of -4,818 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
CoalCoal80 (noted)Always14,320
Adamantite oreAdamantite ore10 (noted)Always11,590
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is 88,140, which is a profit/loss of 44,061 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune halberdRune halberd1Always74,789
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is 63,880, which is a profit/loss of 19,801 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune full helmRune full helm1Always19,581
Rune kiteshieldRune kiteshield1Always30,948
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is 49,999 for male characters and 50,297 for female characters, which is a profit/loss of 5,920 for male characters and 6,218 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune platelegsRune platelegs1Common[1]36,648
Rune plateskirtRune plateskirt1Common[1]36,946
  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 54,895, which is a profit/loss of 10,816 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Rune barRune bar3Always41,544
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is 37,613, which is a profit/loss of -6,466 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Fire talismanFire talisman(noted)Always9,740
Water talismanWater talisman(noted)Always14,522
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is 37,399, which is a profit/loss of -6,680 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,351
Uncut diamondUncut diamond3Always14,877
Uncut rubyUncut ruby3Always9,171
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is 4,895,648, which is a profit/loss of 4,851,569 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 dragonstone1Always13,351
Dragonstone helmDragonstone helm1Common[2]3,900,782
Dragonstone hauberkDragonstone hauberk1Common[2]8,813,155
Dragonstone greavesDragonstone greaves1Common[2]4,199,789
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,677,819
Dragonstone bootsDragonstone boots1Common[2]3,819,938
  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 6,004. 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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