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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 generally more profitable to sell the key than to us it. The key is used one time and disappears.

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 44,935, which is a profit/loss of 2,365 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Calquat tree seed 5Calquat tree seed1Common[1]12,810
Papaya tree seed 5Papaya tree seed1Common[1]32,990
Palm tree seed 5Palm tree seed1Common[1]114,311
  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 15,543, which is a profit/loss of -27,027 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Lantadyme seed 5Lantadyme seed2Always1,818
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 24,925, which is a profit/loss of -17,645 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Grimy torstolGrimy torstol2Always11,200
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 103,775, which is a profit/loss of 61,205 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Law runeLaw rune50Always11,450
Chaos runeChaos rune50Always3,650
Cosmic runeCosmic rune50Always17,150
Death runeDeath rune50Always7,750
Nature runeNature rune50Always18,450
Body runeBody rune200Always6,800
Mind runeMind rune200Always3,000
Earth runeEarth rune200Always2,000
Air runeAir rune200Always4,000
Water runeWater rune200Always2,200
Fire runeFire rune200Always13,600
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 87,125, which is a profit/loss of 44,555 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Iron oreIron ore200 (noted)Always73,400
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 37,725, which is a profit/loss of -4,845 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
CoalCoal150 (noted)Always24,000
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 55,635, which is a profit/loss of 13,065 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune barRune bar3Always41,910
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 38,160, which is a profit/loss of -4,410 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Uncut diamondUncut diamond3Always13,980
Uncut rubyUncut ruby3Always10,455
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 43,834, which is a profit/loss of 1,264 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Loop half of a keyLoop half of a key1Always15,109
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 52,105, which is a profit/loss of 9,535 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Tooth half of a keyTooth half of a key1Always23,380
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 50,790, which is a profit/loss of 8,220 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune platebodyRune platebody1Always37,065
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 49,318 for male characters and 49,463 for female characters, which is a profit/loss of 6,748 for male characters and 6,893 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune platelegsRune platelegs1Common[1]35,593
Rune plateskirtRune plateskirt1Common[1]35,738
  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 5,433,742, which is a profit/loss of 5,391,172 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 dragonstone1Always13,725
Dragonstone helmDragonstone helm1Common[2]4,351,558
Dragonstone hauberkDragonstone hauberk1Common[2]9,241,435
Dragonstone greavesDragonstone greaves1Common[2]4,645,945
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,719,338
Dragonstone bootsDragonstone boots1Common[2]5,141,810
  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 32,455, which is a profit/loss of -10,115 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Grimy lantadymeGrimy lantadyme5Always18,730
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 2 - Tree seedsEdit

The expected value of Possibility 2 is 255,797, which is a profit/loss of 213,227 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Yew seed 5Yew seed1Common33,178
Papaya tree seed 5Papaya tree seed1Common32,990
Elder seed 5Elder seed1Uncommon175,904
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is 37,105, which is a profit/loss of -5,465 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Tooth half of a keyTooth half of a key1Always23,380
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is 28,834, which is a profit/loss of -13,736 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Loop half of a keyLoop half of a key1Always15,109
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 5 - Herb seedsEdit

The expected value of Possibility 5 is 20,408, which is a profit/loss of -22,162 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Dwarf weed seed 5Dwarf weed seed1Common937
Torstol seed 5Torstol seed2Common5,746
Possibility 6 - OresEdit

The expected value of Possibility 6 is 35,785, which is a profit/loss of -6,785 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
CoalCoal80 (noted)Always12,800
Adamantite oreAdamantite ore10 (noted)Always9,260
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is 87,710, which is a profit/loss of 45,140 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune halberdRune halberd1Always73,985
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is 63,012, which is a profit/loss of 20,442 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune full helmRune full helm1Always18,789
Rune kiteshieldRune kiteshield1Always30,498
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is 49,318 for male characters and 49,463 for female characters, which is a profit/loss of 6,748 for male characters and 6,893 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune platelegsRune platelegs1Common[1]35,593
Rune plateskirtRune plateskirt1Common[1]35,738
  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 55,635, which is a profit/loss of 13,065 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Rune barRune bar3Always41,910
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is 36,746, which is a profit/loss of -5,824 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Fire talismanFire talisman(noted)Always9,045
Water talismanWater talisman(noted)Always13,976
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is 38,160, which is a profit/loss of -4,410 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always13,725
Uncut diamondUncut diamond3Always13,980
Uncut rubyUncut ruby3Always10,455
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is 5,433,742, which is a profit/loss of 5,391,172 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 dragonstone1Always13,725
Dragonstone helmDragonstone helm1Common[2]4,351,558
Dragonstone hauberkDragonstone hauberk1Common[2]9,241,435
Dragonstone greavesDragonstone greaves1Common[2]4,645,945
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,719,338
Dragonstone bootsDragonstone boots1Common[2]5,141,810
  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 6,315. (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.

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