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Crystal chest

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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 more monetarily satisfying to sell the key. When the key is used it disappears, so opening the chest is a gamble.

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 47,890, which is a profit/loss of 1,582 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Calquat tree seed 5Calquat tree seed1Common[1]14,069
Papaya tree seed 5Papaya tree seed1Common[1]40,088
Palm tree seed 5Palm tree seed1Common[1]109,034
  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 15,383, which is a profit/loss of -30,925 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Lantadyme seed 5Lantadyme seed2Always2,022
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 23,099, which is a profit/loss of -23,209 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Grimy torstolGrimy torstol2Always9,738
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 114,761, which is a profit/loss of 68,453 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Law runeLaw rune50Always10,100
Chaos runeChaos rune50Always3,150
Cosmic runeCosmic rune50Always15,500
Death runeDeath rune50Always8,350
Nature runeNature rune50Always20,700
Body runeBody rune200Always6,800
Mind runeMind rune200Always3,200
Earth runeEarth rune200Always2,800
Air runeAir rune200Always6,000
Water runeWater rune200Always3,400
Fire runeFire rune200Always21,400
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 82,961, which is a profit/loss of 36,653 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Iron oreIron ore200 (noted)Always69,600
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 42,761, which is a profit/loss of -3,547 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
CoalCoal150 (noted)Always29,400
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 55,619, which is a profit/loss of 9,311 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune barRune bar3Always42,258
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 35,054, which is a profit/loss of -11,254 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Uncut diamondUncut diamond3Always12,003
Uncut rubyUncut ruby3Always9,690
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 46,488, which is a profit/loss of 180 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Loop half of a keyLoop half of a key1Always18,127
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 55,487, which is a profit/loss of 9,179 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Tooth half of a keyTooth half of a key1Always27,126
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 50,732, which is a profit/loss of 4,424 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune platebodyRune platebody1Always37,371
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 50,135 for male characters and 50,169 for female characters, which is a profit/loss of 3,827 for male characters and 3,861 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune platelegsRune platelegs1Common[1]36,774
Rune plateskirtRune plateskirt1Common[1]36,808
  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 5,633,231, which is a profit/loss of 5,586,923 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 dragonstone1Always13,361
Dragonstone helmDragonstone helm1Common[2]4,404,858
Dragonstone hauberkDragonstone hauberk1Common[2]9,664,162
Dragonstone greavesDragonstone greaves1Common[2]4,878,755
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,807,754
Dragonstone bootsDragonstone boots1Common[2]5,343,819
  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

Crystal chest (Prifddinas)
Crystal chest (Prifddinas) location

Prifddinas chest location.

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 32,406, which is a profit/loss of -13,902 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Grimy lantadymeGrimy lantadyme5Always19,045
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 2 - Tree seedsEdit

The expected value of Possibility 2 is 254,939, which is a profit/loss of 208,631 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Yew seed 5Yew seed1Common32,443
Papaya tree seed 5Papaya tree seed1Common40,088
Elder seed 5Elder seed1Uncommon169,047
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is 40,487, which is a profit/loss of -5,821 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Tooth half of a keyTooth half of a key1Always27,126
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is 31,488, which is a profit/loss of -14,820 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Loop half of a keyLoop half of a key1Always18,127
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 5 - Herb seedsEdit

The expected value of Possibility 5 is 21,394, which is a profit/loss of -24,914 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Dwarf weed seed 5Dwarf weed seed1Common1,095
Torstol seed 5Torstol seed2Common6,938
Possibility 6 - OresEdit

The expected value of Possibility 6 is 38,861, which is a profit/loss of -7,447 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
CoalCoal80 (noted)Always15,680
Adamantite oreAdamantite ore10 (noted)Always9,820
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is 88,698, which is a profit/loss of 42,390 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune halberdRune halberd1Always75,337
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is 63,744, which is a profit/loss of 17,436 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune full helmRune full helm1Always19,439
Rune kiteshieldRune kiteshield1Always30,944
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is 50,135 for male characters and 50,169 for female characters, which is a profit/loss of 3,827 for male characters and 3,861 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune platelegsRune platelegs1Common[1]36,774
Rune plateskirtRune plateskirt1Common[1]36,808
  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 55,619, which is a profit/loss of 9,311 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Rune barRune bar3Always42,258
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is 38,722, which is a profit/loss of -7,586 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Fire talismanFire talisman(noted)Always9,865
Water talismanWater talisman(noted)Always15,496
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is 35,054, which is a profit/loss of -11,254 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,361
Uncut diamondUncut diamond3Always12,003
Uncut rubyUncut ruby3Always9,690
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is 5,633,231, which is a profit/loss of 5,586,923 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 dragonstone1Always13,361
Dragonstone helmDragonstone helm1Common[2]4,404,858
Dragonstone hauberkDragonstone hauberk1Common[2]9,664,162
Dragonstone greavesDragonstone greaves1Common[2]4,878,755
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,807,754
Dragonstone bootsDragonstone boots1Common[2]5,343,819
  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 3,740. (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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