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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. Unless otherwise specified, all possibilities give all of the listed rewards when obtained.

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 a female character.

Taverley chestEdit

Possibility 1 - Fruit tree seedEdit

The expected value of Possibility 1 is 31,681, which is a profit/loss of -4,565 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Calquat tree seed 5Calquat tree seed1Common[1]1,318
Papaya tree seed 5Papaya tree seed1Common[1]23,005
Palm tree seed 5Palm tree seed1Uncommon[1]103,049
  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 12,375, which is a profit/loss of -23,871 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Lantadyme seed 5Lantadyme seed2Common1,118
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 18,349, which is a profit/loss of -17,897 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Grimy torstolGrimy torstol2Common7,092
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 126,207, which is a profit/loss of 89,961 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Law runeLaw rune50Common21,250
Chaos runeChaos rune50Common6,450
Cosmic runeCosmic rune50Common20,350
Death runeDeath rune50Common7,300
Nature runeNature rune50Common21,800
Body runeBody rune200Common6,200
Mind runeMind rune200Common3,800
Earth runeEarth rune200Common4,000
Air runeAir rune200Common6,400
Water runeWater rune200Common4,800
Fire runeFire rune200Common12,600
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 47,457, which is a profit/loss of 11,211 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Iron oreIron ore200 (noted)Common36,200
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 30,607, which is a profit/loss of -5,639 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
CoalCoal150 (noted)Common19,350
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 52,741, which is a profit/loss of 16,495 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune barRune bar3Common41,484
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 24,742, which is a profit/loss of -11,504 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Uncut diamondUncut diamond3Common8,976
Uncut rubyUncut ruby3Common4,509
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 43,313, which is a profit/loss of 7,067 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Loop half of a keyLoop half of a key1Common17,056
Coins 10000Coins15,000Common15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 45,724, which is a profit/loss of 9,478 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Tooth half of a keyTooth half of a key1Common19,467
Coins 10000Coins15,000Common15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 49,122, which is a profit/loss of 12,876 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune platebodyRune platebody1Common37,865
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 48,486 for male characters and 48,487 for female characters, which is a profit/loss of 12,240 for male characters and 12,241 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune platelegsRune platelegs1Common[1]37,229
Rune plateskirtRune plateskirt1Common[1]37,230
  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 6,504,853, which is a profit/loss of 6,468,607 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 dragonstone1Always11,257
Dragonstone helmDragonstone helm1Very rare[2]5,156,569
Dragonstone hauberkDragonstone hauberk1Very rare[2]12,191,138
Dragonstone greavesDragonstone greaves1Very rare[2]5,789,526
Dragonstone gauntletsDragonstone gauntlets1Very rare[2]4,564,159
Dragonstone bootsDragonstone boots1Very rare[2]4,766,589
  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. 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 50,046.8, which is a profit/loss of 13,800.8 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Yew seed 5Yew seed1Common29,417
Papaya tree seed 5Papaya tree seed1Common23,005
Elder seed 5Elder seed1Uncommon89,105
Possibility 2 - Herb seedsEdit

The expected value of Possibility 2 is 14,209, which is a profit/loss of -22,037 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Dwarf weed seed 5Dwarf weed seed1Common684
Torstol seed 5Torstol seed2Common2,268
Possibility 3Edit

The expected value of Possibility 3 is 25,722, which is a profit/loss of -10,524 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Grimy lantadymeGrimy lantadyme5Common14,465
Crystal tree blossomCrystal tree blossom1CommonNot sold
Possibility 4 - TalismansEdit

The expected value of Possibility 4 is 36,059, which is a profit/loss of -187 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Fire talismanFire talisman(noted)Common9,910
Water talismanWater talisman(noted)Common14,892
Possibility 5 - Rune HalberdEdit

The expected value of Possibility 5 is 86,802, which is a profit/loss of 50,556 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune halberdRune halberd1Common75,545
Possibility 6 - OresEdit

The expected value of Possibility 6 is 34,377, which is a profit/loss of -1,869 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
CoalCoal80 (noted)Common10,320
Adamantite oreAdamantite ore10 (noted)Common12,800
Corrupted oreCorrupted ore50CommonNot sold
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 52,741, which is a profit/loss of 16,495 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune barRune bar3Common41,484
Possibility 8 - Uncut gemsEdit

The expected value of Possibility 8 is 24,742, which is a profit/loss of -11,504 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Uncut diamondUncut diamond3Common8,976
Uncut rubyUncut ruby3Common4,509
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 28,313, which is a profit/loss of -7,933 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Loop half of a keyLoop half of a key1Common17,056
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 30,724, which is a profit/loss of -5,522 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Tooth half of a keyTooth half of a key1Common19,467
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 11 - Rune armourEdit

The expected value of Possibility 11 is 62,603, which is a profit/loss of 26,357 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune full helmRune full helm1Common19,927
Rune kiteshieldRune kiteshield1Common31,419
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 48,486 for male characters and 48,487 for female characters, which is a profit/loss of 12,240 for male characters and 12,241 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always11,257
Rune platelegsRune platelegs1Common[1]37,229
Rune plateskirtRune plateskirt1Common[1]37,230
  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 6,504,853, which is a profit/loss of 6,468,607 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 dragonstone1Always11,257
Dragonstone helmDragonstone helm1Very rare[2]5,156,569
Dragonstone hauberkDragonstone hauberk1Very rare[2]12,191,138
Dragonstone greavesDragonstone greaves1Very rare[2]5,789,526
Dragonstone gauntletsDragonstone gauntlets1Very rare[2]4,564,159
Dragonstone bootsDragonstone boots1Very rare[2]4,766,589
  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 1000 crystal chest loots on the Taverley chest, while wearing a luck of the dwarves.
Possibility Percentage
Possibility 1: Fruit tree seed 6.4%[notes 1]
Possibility 2: Lantadyme seeds 7.9%
Possibility 3: Grimy torstols 9.4%
Possibility 4: Runes 10%
Possibility 5: Iron ore 9.1%
Possibility 6: Coal 9.8%
Possibility 7: Rune bars 9.4%
Possibility 8: Gems 8.3%
Possibility 9: Loop half of a key 7.4%
Possibility 10: Tooth half of a key 6.8%
Possibility 11: Rune platebody 7.2%
Possibility 12: Rune platelegs or plateskirt 8.3%
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 48.45% for the calquat, 42.18% for the papaya, and 9.37% for the palm tree seed.

Using these probabilities, the expected average profit/loss, per crystal key, when looting the crystal chest is 9,310. 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.

Prifddinas chestEdit

The probabilities in this section are an estimation based on the data of 20,000 loots of the Prifddinas crystal chest while wearing luck of the dwarves. The loot from the Prifddinas chest is not affected by the Voice of Seren.[1]
Possibility Percentage
Possibility 1: Tree seeds 7.59%
Possibility 2: Herb seeds 7.555%
Possibility 3: Grimy lantadymes 4.47%
Possibility 4: Talismans 7.545%
Possibility 5: Rune Halberd 6.00%
Possibility 6: Ores 10.36%
Possibility 7: Rune bars 9.455%
Possibility 8: Gems 9.525%
Possibility 9: Loop half of a key 9.30%
Possibility 10: Tooth half of a key 9.045%
Possibility 11: Rune full helm and rune kiteshield 8.81%
Possibility 12: Rune platelegs or plateskirt 10.34%
Possibility 13: Dragonstone armour < 0.01%

Using these probabilities, the expected average profit/loss, per crystal key, when looting the crystal chest is 4,550. Assuming you will receive rune platelegs, the crystal key is bought at GE price and the luck of the dwarves ring is worn. This is excluding the possibility of receiving a dragonstone armour piece, as this possibility is much too rare to estimate with any acceptable accuracy.

Estimate probabilities for non-guaranteed loot are:

  • 17.785% chance of crystal motherlode shard when rolling possibility 9 or 10. This assumes that possibility 9 and 10 yield the same chance for crystal motherlode shards.
  • 8.675% chance of receiving elder seed when rolling possibility 1.
  • 63.385% chance of receiving papaya tree seed when rolling possibility 1.
  • 27.94% chance of receiving yew seed when rolling possibility 1.
  • 20.39% chance of receiving dwarf weed seed when rolling possibility 2.
  • 79.61% chance of receiving torstol seed when rolling possibility 2.

TriviaEdit

  • The crystal key chest was reworked on 11 June 2013 with the release of the Triskelion Treasures. Previous old drops, such as receiving 2,000 coins and a Spinach roll along with an Uncut dragonstone, were removed, and new ones were added, such as the Dragonstone armour.
  • The estimated dragonstone armour possibility chance is about 0.000147%.

ReferencesEdit

  1. ^ Mod Hunter. 10K crystal chests VoS vs. no VoS. 2017-06-29. "If nothing else all of your testing has at least gained mod confirmation that there isn't - and has never been - any impact from the VoS on the crystal chest."*