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Crystal chest

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Classic Runestone
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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 56,618, which is a profit/loss of 14,752 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Calquat tree seed 5Calquat tree seed1Common[1]13,476
Papaya tree seed 5Papaya tree seed1Common[1]47,729
Palm tree seed 5Palm tree seed1Common[1]179,318
  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 13,958, which is a profit/loss of -27,908 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Lantadyme seed 5Lantadyme seed2Always1,462
Possibility 3 - Grimy torstolsEdit

The expected value of Possibility 3 is 21,106, which is a profit/loss of -20,760 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Grimy torstolGrimy torstol2Always8,610
Possibility 4 - RunesEdit

The expected value of Possibility 4 is 107,596, which is a profit/loss of 65,730 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Law runeLaw rune50Always10,950
Chaos runeChaos rune50Always3,800
Cosmic runeCosmic rune50Always16,000
Death runeDeath rune50Always10,200
Nature runeNature rune50Always17,550
Body runeBody rune200Always8,200
Mind runeMind rune200Always4,000
Earth runeEarth rune200Always2,600
Air runeAir rune200Always4,800
Water runeWater rune200Always2,800
Fire runeFire rune200Always14,200
Possibility 5 - Iron oreEdit

The expected value of Possibility 5 is 81,896, which is a profit/loss of 40,030 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Iron oreIron ore200 (noted)Always69,400
Possibility 6 - CoalEdit

The expected value of Possibility 6 is 46,096, which is a profit/loss of 4,230 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
CoalCoal150 (noted)Always33,600
Possibility 7 - Rune barsEdit

The expected value of Possibility 7 is 54,820, which is a profit/loss of 12,954 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune barRune bar3Always42,324
Possibility 8 - GemsEdit

The expected value of Possibility 8 is 32,620, which is a profit/loss of -9,246 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Uncut diamondUncut diamond3Always11,901
Uncut rubyUncut ruby3Always8,223
Possibility 9 - Loop half of a keyEdit

The expected value of Possibility 9 is 44,872, which is a profit/loss of 3,006 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Loop half of a keyLoop half of a key1Always17,376
Coins 10000Coins15,000Always15,000
Possibility 10 - Tooth half of a keyEdit

The expected value of Possibility 10 is 51,683, which is a profit/loss of 9,817 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Tooth half of a keyTooth half of a key1Always24,187
Coins 10000Coins15,000Always15,000
Possibility 11 - Rune platebodyEdit

The expected value of Possibility 11 is 50,230, which is a profit/loss of 8,364 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune platebodyRune platebody1Always37,734
Possibility 12 - Rune platelegs or plateskirtEdit

The expected value of Possibility 12 is 49,567 for male characters and 49,526 for female characters, which is a profit/loss of 7,701 for male characters and 7,660 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune platelegsRune platelegs1Common[1]37,071
Rune plateskirtRune plateskirt1Common[1]37,030
  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 4,908,082, which is a profit/loss of 4,866,216 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 dragonstone1Always12,496
Dragonstone helmDragonstone helm1Common[2]3,999,331
Dragonstone hauberkDragonstone hauberk1Common[2]8,596,798
Dragonstone greavesDragonstone greaves1Common[2]4,249,487
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,780,508
Dragonstone bootsDragonstone boots1Common[2]3,851,807
  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 30,161, which is a profit/loss of -11,705 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Grimy lantadymeGrimy lantadyme5Always17,665
Crystal tree blossomCrystal tree blossom1AlwaysNot sold
Possibility 2 - Tree seedsEdit

The expected value of Possibility 2 is 265,099, which is a profit/loss of 223,233 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Yew seed 5Yew seed1Common44,777
Papaya tree seed 5Papaya tree seed1Common47,729
Elder seed 5Elder seed1Uncommon160,097
Possibility 3 - Tooth half of a keyEdit

The expected value of Possibility 3 is 36,683, which is a profit/loss of -5,183 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Tooth half of a keyTooth half of a key1Always24,187
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 4 - Loop half of a keyEdit

The expected value of Possibility 4 is 29,872, which is a profit/loss of -11,994 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Loop half of a keyLoop half of a key1Always17,376
Crystal motherlode shardCrystal motherlode shard10CommonNot sold
Possibility 5 - Herb seedsEdit

The expected value of Possibility 5 is 16,705, which is a profit/loss of -25,161 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Dwarf weed seed 5Dwarf weed seed1Common635
Torstol seed 5Torstol seed2Common3,574
Possibility 6 - OresEdit

The expected value of Possibility 6 is 46,016, which is a profit/loss of 4,150 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
CoalCoal80 (noted)Always17,920
Adamantite oreAdamantite ore10 (noted)Always15,600
Corrupted oreCorrupted ore50AlwaysNot sold
Possibility 7 - Rune HalberdEdit

The expected value of Possibility 7 is 87,680, which is a profit/loss of 45,814 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune halberdRune halberd1Always75,184
Possibility 8 - Rune armourEdit

The expected value of Possibility 8 is 63,285, which is a profit/loss of 21,419 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune full helmRune full helm1Always19,824
Rune kiteshieldRune kiteshield1Always30,965
Possibility 9 - Rune platelegs or plateskirtEdit

The expected value of Possibility 9 is 49,567 for male characters and 49,526 for female characters, which is a profit/loss of 7,701 for male characters and 7,660 for female characters, if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune platelegsRune platelegs1Common[1]37,071
Rune plateskirtRune plateskirt1Common[1]37,030
  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 54,820, which is a profit/loss of 12,954 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Rune barRune bar3Always42,324
Possibility 11 - TalismansEdit

The expected value of Possibility 11 is 32,776, which is a profit/loss of -9,090 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Fire talismanFire talisman(noted)Always7,830
Water talismanWater talisman(noted)Always12,450
Possibility 12 - Uncut gemsEdit

The expected value of Possibility 12 is 32,620, which is a profit/loss of -9,246 if buying the crystal key on the GE.

Item Quantity Rarity GE price
Uncut dragonstoneUncut dragonstone1Always12,496
Uncut diamondUncut diamond3Always11,901
Uncut rubyUncut ruby3Always8,223
Possibility 13 - Dragonstone armourEdit

The expected value of Possibility 13 is 4,908,082, which is a profit/loss of 4,866,216 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 dragonstone1Always12,496
Dragonstone helmDragonstone helm1Common[2]3,999,331
Dragonstone hauberkDragonstone hauberk1Common[2]8,596,798
Dragonstone greavesDragonstone greaves1Common[2]4,249,487
Dragonstone gauntletsDragonstone gauntlets1Common[2]3,780,508
Dragonstone bootsDragonstone boots1Common[2]3,851,807
  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 7,459. 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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