Crystal chest
this wiki
Release date  27 February 2002 (Update) 

Members?  Yes 
Quest?  No 
Location  Taverley 
Examine  A crystal key can open it. 
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.
Contents
[show]RewardsEdit
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.
Possibilities  Taverley chestEdit
Possibility 1  Fruit tree seedEdit
The expected value of Possibility 1 is 64,219, which is a profit/loss of 4,838 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Calquat tree seed  1  Common^{[1]}  19,156  
Papaya tree seed  1  Common^{[1]}  61,846  
Palm tree seed  1  Common^{[1]}  155,178 
 ^ ^{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 27,693, which is a profit/loss of 31,688 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Lantadyme seed  2  Always  14,400 
Possibility 3  Grimy torstolsEdit
The expected value of Possibility 3 is 24,375, which is a profit/loss of 35,006 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Grimy torstol  2  Always  11,082 
Possibility 4  RunesEdit
The expected value of Possibility 4 is 115,493, which is a profit/loss of 56,112 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Law rune  50  Always  12,350  
Chaos rune  50  Always  3,450  
Cosmic rune  50  Always  12,350  
Death rune  50  Always  14,400  
Nature rune  50  Always  14,250  
Body rune  200  Always  14,200  
Mind rune  200  Always  4,000  
Earth rune  200  Always  2,800  
Air rune  200  Always  3,600  
Water rune  200  Always  4,000  
Fire rune  200  Always  16,800 
Possibility 5  Iron oreEdit
The expected value of Possibility 5 is 64,293, which is a profit/loss of 4,912 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Iron ore  200 (noted)  Always  51,000 
Possibility 6  CoalEdit
The expected value of Possibility 6 is 68,343, which is a profit/loss of 8,962 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Coal  150 (noted)  Always  55,050 
Possibility 7  Rune barsEdit
The expected value of Possibility 7 is 55,332, which is a profit/loss of 4,049 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune bar  3  Always  42,039 
Possibility 8  GemsEdit
The expected value of Possibility 8 is 34,425, which is a profit/loss of 24,956 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Uncut diamond  3  Always  12,975  
Uncut ruby  3  Always  8,157 
Possibility 9  Loop half of a keyEdit
The expected value of Possibility 9 is 46,377, which is a profit/loss of 13,004 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Loop half of a key  1  Always  18,084  
Coins  15,000  Always  Not sold 
Possibility 10  Tooth half of a keyEdit
The expected value of Possibility 10 is 68,020, which is a profit/loss of 8,639 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Tooth half of a key  1  Always  39,727  
Coins  15,000  Always  Not sold 
Possibility 11  Rune platebodyEdit
The expected value of Possibility 11 is 51,369, which is a profit/loss of 8,012 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune platebody  1  Always  38,076 
Possibility 12  Rune platelegs or plateskirtEdit
The expected value of Possibility 12 is 50,757 for male characters and 50,825 for female characters, which is a profit/loss of 8,624 for male characters and 8,556 for female characters, if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune platelegs  1  Common^{[1]}  37,464  
Rune plateskirt  1  Common^{[1]}  37,532 
 ^ ^{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 9,655,570, which is a profit/loss of 9,596,189 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 market price  

Uncut dragonstone  1  Always  13,293  
Dragonstone helm  1  Common^{[2]}  6,543,863  
Dragonstone hauberk  1  Common^{[2]}  16,266,534  
Dragonstone greaves  1  Common^{[2]}  10,487,570  
Dragonstone gauntlets  1  Common^{[2]}  7,013,815  
Dragonstone boots  1  Common^{[2]}  7,899,602 
 ^ https://twitter.com/JagexTimbo/status/557600452150579200
 ^ ^{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.
Possibilities  Prifddinas chestEdit
This chest was released with part 1 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 Prifddinasrelated 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 47,263, which is a profit/loss of 12,118 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Grimy lantadyme  5  Always  33,970  
Crystal tree blossom  1  Always  Not sold 
Possibility 2  Tree seedsEdit
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Yew seed  1  Common  43,107  
Papaya tree seed  1  Common  61,846  
Elder seed  1  Uncommon  153,383 
Possibility 3  Tooth half of a keyEdit
The expected value of Possibility 3 is 53,020, which is a profit/loss of 6,361 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Tooth half of a key  1  Always  39,727  
Crystal motherlode shard  10  Common  Not sold 
Possibility 4  Loop half of a keyEdit
The expected value of Possibility 4 is 31,377, which is a profit/loss of 28,004 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Loop half of a key  1  Always  18,084  
Crystal motherlode shard  10  Common  Not sold 
Possibility 5  Herb seedsEdit
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Dwarf weed seed  1  Common  8,569  
Torstol seed  2  Common  7,320 
Possibility 6  OresEdit
The expected value of Possibility 6 is 55,653, which is a profit/loss of 3,728 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Coal  80 (noted)  Always  29,360  
Adamantite ore  10 (noted)  Always  13,000  
Corrupted ore  50  Always  Not sold 
Possibility 7  Rune HalberdEdit
The expected value of Possibility 7 is 88,661, which is a profit/loss of 29,280 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune halberd  1  Always  75,368 
Possibility 8  Rune armourEdit
The expected value of Possibility 8 is 65,157, which is a profit/loss of 5,776 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune full helm  1  Always  20,219  
Rune kiteshield  1  Always  31,645 
Possibility 9  Rune platelegs or plateskirtEdit
The expected value of Possibility 9 is 50,757 for male characters and 50,825 for female characters, which is a profit/loss of 8,624 for male characters and 8,556 for female characters, if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune platelegs  1  Common^{[1]}  37,464  
Rune plateskirt  1  Common^{[1]}  37,532 
 ^ ^{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 55,332, which is a profit/loss of 4,049 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Rune bar  3  Always  42,039 
Possibility 11  TalismansEdit
The expected value of Possibility 11 is 53,893, which is a profit/loss of 5,488 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Fire talisman  5 (noted)  Always  16,230  
Water talisman  2 (noted)  Always  24,370 
Possibility 12  Uncut gemsEdit
The expected value of Possibility 12 is 34,425, which is a profit/loss of 24,956 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE market price  

Uncut dragonstone  1  Always  13,293  
Uncut diamond  3  Always  12,975  
Uncut ruby  3  Always  8,157 
Possibility 13  Dragonstone armourEdit
The expected value of Possibility 13 is 9,655,570, which is a profit/loss of 9,596,189 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 market price  

Uncut dragonstone  1  Always  13,293  
Dragonstone helm  1  Common^{[2]}  6,543,863  
Dragonstone hauberk  1  Common^{[2]}  16,266,534  
Dragonstone greaves  1  Common^{[2]}  10,487,570  
Dragonstone gauntlets  1  Common^{[2]}  7,013,815  
Dragonstone boots  1  Common^{[2]}  7,899,602 
 ^ https://twitter.com/JagexTimbo/status/557600452150579200
 ^ ^{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.
Probabilities  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% 
 ^ The 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 5,074. (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
 The crystal key chest was reworked on 11 June 2013 with the release of the Triskelion Treasures. Previous old drops, such as receiving 2000 coins and a Spinach roll along with an Uncut dragonstone, were removed, and new ones were added, such as the Dragonstone armour.
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