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.
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 dragonstone  1  Always  13,361  
Calquat tree seed  1  Common^{[1]}  14,069  
Papaya tree seed  1  Common^{[1]}  40,088  
Palm tree seed  1  Common^{[1]}  109,034 
 ^ ^{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 dragonstone  1  Always  13,361  
Lantadyme seed  2  Always  2,022 
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 dragonstone  1  Always  13,361  
Grimy torstol  2  Always  9,738 
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 dragonstone  1  Always  13,361  
Law rune  50  Always  10,100  
Chaos rune  50  Always  3,150  
Cosmic rune  50  Always  15,500  
Death rune  50  Always  8,350  
Nature rune  50  Always  20,700  
Body rune  200  Always  6,800  
Mind rune  200  Always  3,200  
Earth rune  200  Always  2,800  
Air rune  200  Always  6,000  
Water rune  200  Always  3,400  
Fire rune  200  Always  21,400 
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 dragonstone  1  Always  13,361  
Iron ore  200 (noted)  Always  69,600 
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 dragonstone  1  Always  13,361  
Coal  150 (noted)  Always  29,400 
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 dragonstone  1  Always  13,361  
Rune bar  3  Always  42,258 
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 dragonstone  1  Always  13,361  
Uncut diamond  3  Always  12,003  
Uncut ruby  3  Always  9,690 
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 dragonstone  1  Always  13,361  
Loop half of a key  1  Always  18,127  
Coins  15,000  Always  15,000 
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 dragonstone  1  Always  13,361  
Tooth half of a key  1  Always  27,126  
Coins  15,000  Always  15,000 
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 dragonstone  1  Always  13,361  
Rune platebody  1  Always  37,371 
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 dragonstone  1  Always  13,361  
Rune platelegs  1  Common^{[1]}  36,774  
Rune plateskirt  1  Common^{[1]}  36,808 
 ^ ^{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 dragonstone  1  Always  13,361  
Dragonstone helm  1  Common^{[2]}  4,404,858  
Dragonstone hauberk  1  Common^{[2]}  9,664,162  
Dragonstone greaves  1  Common^{[2]}  4,878,755  
Dragonstone gauntlets  1  Common^{[2]}  3,807,754  
Dragonstone boots  1  Common^{[2]}  5,343,819 
 ^ 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.
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 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 32,406, which is a profit/loss of 13,902 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  13,361  
Grimy lantadyme  5  Always  19,045  
Crystal tree blossom  1  Always  Not 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 dragonstone  1  Always  13,361  
Yew seed  1  Common  32,443  
Papaya tree seed  1  Common  40,088  
Elder seed  1  Uncommon  169,047 
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 dragonstone  1  Always  13,361  
Tooth half of a key  1  Always  27,126  
Crystal motherlode shard  10  Common  Not 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 dragonstone  1  Always  13,361  
Loop half of a key  1  Always  18,127  
Crystal motherlode shard  10  Common  Not 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 dragonstone  1  Always  13,361  
Dwarf weed seed  1  Common  1,095  
Torstol seed  2  Common  6,938 
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 dragonstone  1  Always  13,361  
Coal  80 (noted)  Always  15,680  
Adamantite ore  10 (noted)  Always  9,820  
Corrupted ore  50  Always  Not 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 dragonstone  1  Always  13,361  
Rune halberd  1  Always  75,337 
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 dragonstone  1  Always  13,361  
Rune full helm  1  Always  19,439  
Rune kiteshield  1  Always  30,944 
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 dragonstone  1  Always  13,361  
Rune platelegs  1  Common^{[1]}  36,774  
Rune plateskirt  1  Common^{[1]}  36,808 
 ^ ^{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 dragonstone  1  Always  13,361  
Rune bar  3  Always  42,258 
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 dragonstone  1  Always  13,361  
Fire talisman  5 (noted)  Always  9,865  
Water talisman  2 (noted)  Always  15,496 
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 dragonstone  1  Always  13,361  
Uncut diamond  3  Always  12,003  
Uncut ruby  3  Always  9,690 
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 dragonstone  1  Always  13,361  
Dragonstone helm  1  Common^{[2]}  4,404,858  
Dragonstone hauberk  1  Common^{[2]}  9,664,162  
Dragonstone greaves  1  Common^{[2]}  4,878,755  
Dragonstone gauntlets  1  Common^{[2]}  3,807,754  
Dragonstone boots  1  Common^{[2]}  5,343,819 
 ^ 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.
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% 
 ^ 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
 The crystal key chest was reworked on 11 June 2013 with the release of the Triskelion Treasures. Previous old drops, such as receiving 2,000 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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