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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.

It is a common misconception that you can obtain crystal weapons from the chest. The chest does not contain any of these items, as they are a quest reward.

Taverley chestEdit

Possibility 1 - Fruit tree seedEdit

The expected value of Possibility 1 is 39,757, which is a profit/loss of -3,083 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Calquat tree seed 5Calquat tree seed1Common[1]16,818
Papaya tree seed 5Papaya tree seed1Common[1]26,382
Palm tree seed 5Palm tree seed1Common[1]81,259
  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 15,325, which is a profit/loss of -27,515 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Lantadyme seed 5Lantadyme seed2Always2,592
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 21,119, which is a profit/loss of -21,721 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Grimy torstolGrimy torstol2Always8,386
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 104,033, which is a profit/loss of 61,193 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Law runeLaw rune50Always10,750
Chaos runeChaos rune50Always3,350
Cosmic runeCosmic rune50Always12,450
Death runeDeath rune50Always10,150
Nature runeNature rune50Always18,200
Body runeBody rune200Always7,600
Mind runeMind rune200Always2,800
Earth runeEarth rune200Always2,200
Air runeAir rune200Always4,200
Water runeWater rune200Always2,600
Fire runeFire rune200Always17,000
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 78,533, which is a profit/loss of 35,693 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Iron oreIron ore200 (noted)Always65,800
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 46,483, which is a profit/loss of 3,643 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
CoalCoal150 (noted)Always33,750
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 53,932, which is a profit/loss of 11,092 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune barRune bar3Always41,199
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 33,121, which is a profit/loss of -9,719 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Uncut diamondUncut diamond3Always11,382
Uncut rubyUncut ruby3Always9,006
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 42,946, which is a profit/loss of 106 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Loop half of a keyLoop half of a key1Always15,213
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 55,877, which is a profit/loss of 13,037 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Tooth half of a keyTooth half of a key1Always28,144
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 50,551, which is a profit/loss of 7,711 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune platebodyRune platebody1Always37,818
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 49,740 for male characters and 49,818 for female characters, which is a profit/loss of 6,900 for male characters and 6,978 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune platelegsRune platelegs1Common[1]37,007
Rune plateskirtRune plateskirt1Common[1]37,085
  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 6,564,297, which is a profit/loss of 6,521,457 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 dragonstone1Always12,733
Dragonstone helmDragonstone helm1Common[2]4,588,928
Dragonstone hauberkDragonstone hauberk1Common[2]10,500,047
Dragonstone greavesDragonstone greaves1Common[2]6,288,073
Dragonstone gauntletsDragonstone gauntlets1Common[2]5,524,888
Dragonstone bootsDragonstone boots1Common[2]5,855,886
  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 29,953, which is a profit/loss of -12,887 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Grimy lantadymeGrimy lantadyme5Always17,220
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 2 - Tree seedsEdit

The expected value of Possibility 2 is 220,564, which is a profit/loss of 177,724 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Yew seed 5Yew seed1Common29,206
Papaya tree seed 5Papaya tree seed1Common26,382
Elder seed 5Elder seed1Uncommon152,243
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is 40,877, which is a profit/loss of -1,963 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Tooth half of a keyTooth half of a key1Always28,144
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is 27,946, which is a profit/loss of -14,894 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Loop half of a keyLoop half of a key1Always15,213
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 5 - Herb seedsEdit
Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Dwarf weed seed 5Dwarf weed seed1Common1,185
Torstol seed 5Torstol seed2Common7,580
Possibility 6 - OresEdit

The expected value of Possibility 6 is 40,193, which is a profit/loss of -2,647 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
CoalCoal80 (noted)Always18,000
Adamantite oreAdamantite ore10 (noted)Always9,460
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is 86,872, which is a profit/loss of 44,032 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune halberdRune halberd1Always74,139
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is 63,956, which is a profit/loss of 21,116 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune full helmRune full helm1Always19,793
Rune kiteshieldRune kiteshield1Always31,430
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is 49,740 for male characters and 49,818 for female characters, which is a profit/loss of 6,900 for male characters and 6,978 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune platelegsRune platelegs1Common[1]37,007
Rune plateskirtRune plateskirt1Common[1]37,085
  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 53,932, which is a profit/loss of 11,092 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Rune barRune bar3Always41,199
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is 34,396, which is a profit/loss of -8,444 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Fire talismanFire talisman(noted)Always8,095
Water talismanWater talisman(noted)Always13,568
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is 33,121, which is a profit/loss of -9,719 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,733
Uncut diamondUncut diamond3Always11,382
Uncut rubyUncut ruby3Always9,006
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is 6,564,297, which is a profit/loss of 6,521,457 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 dragonstone1Always12,733
Dragonstone helmDragonstone helm1Common[2]4,588,928
Dragonstone hauberkDragonstone hauberk1Common[2]10,500,047
Dragonstone greavesDragonstone greaves1Common[2]6,288,073
Dragonstone gauntletsDragonstone gauntlets1Common[2]5,524,888
Dragonstone bootsDragonstone boots1Common[2]5,855,886
  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 4,873. (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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