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 52,776, which is a profit/loss of 7,121 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Calquat tree seed  1  Common^{[1]}  15,192  
Papaya tree seed  1  Common^{[1]}  43,138  
Palm tree seed  1  Common^{[1]}  132,549 
 ^ ^{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 16,248, which is a profit/loss of 29,407 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Lantadyme seed  2  Always  2,036 
Possibility 3  Grimy torstolsEdit
The expected value of Possibility 3 is 25,496, which is a profit/loss of 20,159 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Grimy torstol  2  Always  11,284 
Possibility 4  RunesEdit
The expected value of Possibility 4 is 115,262, which is a profit/loss of 69,607 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Law rune  50  Always  11,200  
Chaos rune  50  Always  3,700  
Cosmic rune  50  Always  20,750  
Death rune  50  Always  8,450  
Nature rune  50  Always  19,950  
Body rune  200  Always  7,000  
Mind rune  200  Always  3,000  
Earth rune  200  Always  2,800  
Air rune  200  Always  6,200  
Water rune  200  Always  3,600  
Fire rune  200  Always  14,400 
Possibility 5  Iron oreEdit
The expected value of Possibility 5 is 87,412, which is a profit/loss of 41,757 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Iron ore  200 (noted)  Always  73,200 
Possibility 6  CoalEdit
The expected value of Possibility 6 is 41,512, which is a profit/loss of 4,143 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Coal  150 (noted)  Always  27,300 
Possibility 7  Rune barsEdit
The expected value of Possibility 7 is 56,605, which is a profit/loss of 10,950 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune bar  3  Always  42,393 
Possibility 8  GemsEdit
The expected value of Possibility 8 is 39,640, which is a profit/loss of 6,015 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Uncut diamond  3  Always  14,436  
Uncut ruby  3  Always  10,992 
Possibility 9  Loop half of a keyEdit
The expected value of Possibility 9 is 46,737, which is a profit/loss of 1,082 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Loop half of a key  1  Always  17,525  
Coins  15,000  Always  15,000 
Possibility 10  Tooth half of a keyEdit
The expected value of Possibility 10 is 57,689, which is a profit/loss of 12,034 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Tooth half of a key  1  Always  28,477  
Coins  15,000  Always  15,000 
Possibility 11  Rune platebodyEdit
The expected value of Possibility 11 is 51,328, which is a profit/loss of 5,673 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune platebody  1  Always  37,116 
Possibility 12  Rune platelegs or plateskirtEdit
The expected value of Possibility 12 is 50,997 for male characters and 50,604 for female characters, which is a profit/loss of 5,342 for male characters and 4,949 for female characters, if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune platelegs  1  Common^{[1]}  36,785  
Rune plateskirt  1  Common^{[1]}  36,392 
 ^ ^{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 5,451,912, which is a profit/loss of 5,406,257 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  14,212  
Dragonstone helm  1  Common^{[2]}  4,351,558  
Dragonstone hauberk  1  Common^{[2]}  9,241,435  
Dragonstone greaves  1  Common^{[2]}  4,645,945  
Dragonstone gauntlets  1  Common^{[2]}  3,807,754  
Dragonstone boots  1  Common^{[2]}  5,141,810 
 ^ 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 37,512, which is a profit/loss of 8,143 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Grimy lantadyme  5  Always  23,300  
Crystal tree blossom  1  Always  Not sold 
Possibility 2  Tree seedsEdit
The expected value of Possibility 2 is 259,703, which is a profit/loss of 214,048 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Yew seed  1  Common  38,865  
Papaya tree seed  1  Common  43,138  
Elder seed  1  Uncommon  163,488 
Possibility 3  Tooth half of a keyEdit
The expected value of Possibility 3 is 42,689, which is a profit/loss of 2,966 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Tooth half of a key  1  Always  28,477  
Crystal motherlode shard  10  Common  Not sold 
Possibility 4  Loop half of a keyEdit
The expected value of Possibility 4 is 31,737, which is a profit/loss of 13,918 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Loop half of a key  1  Always  17,525  
Crystal motherlode shard  10  Common  Not sold 
Possibility 5  Herb seedsEdit
The expected value of Possibility 5 is 21,045, which is a profit/loss of 24,610 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Dwarf weed seed  1  Common  1,053  
Torstol seed  2  Common  5,780 
Possibility 6  OresEdit
The expected value of Possibility 6 is 39,722, which is a profit/loss of 5,933 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Coal  80 (noted)  Always  14,560  
Adamantite ore  10 (noted)  Always  10,950  
Corrupted ore  50  Always  Not sold 
Possibility 7  Rune HalberdEdit
The expected value of Possibility 7 is 89,373, which is a profit/loss of 43,718 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune halberd  1  Always  75,161 
Possibility 8  Rune armourEdit
The expected value of Possibility 8 is 64,154, which is a profit/loss of 18,499 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune full helm  1  Always  19,301  
Rune kiteshield  1  Always  30,641 
Possibility 9  Rune platelegs or plateskirtEdit
The expected value of Possibility 9 is 50,997 for male characters and 50,604 for female characters, which is a profit/loss of 5,342 for male characters and 4,949 for female characters, if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune platelegs  1  Common^{[1]}  36,785  
Rune plateskirt  1  Common^{[1]}  36,392 
 ^ ^{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 56,605, which is a profit/loss of 10,950 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Rune bar  3  Always  42,393 
Possibility 11  TalismansEdit
The expected value of Possibility 11 is 41,763, which is a profit/loss of 3,892 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Fire talisman  5 (noted)  Always  12,065  
Water talisman  2 (noted)  Always  15,486 
Possibility 12  Uncut gemsEdit
The expected value of Possibility 12 is 39,640, which is a profit/loss of 6,015 if buying the crystal key on the GE.
Item  Quantity  Rarity  GE price  

Uncut dragonstone  1  Always  14,212  
Uncut diamond  3  Always  14,436  
Uncut ruby  3  Always  10,992 
Possibility 13  Dragonstone armourEdit
The expected value of Possibility 13 is 5,451,912, which is a profit/loss of 5,406,257 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  14,212  
Dragonstone helm  1  Common^{[2]}  4,351,558  
Dragonstone hauberk  1  Common^{[2]}  9,241,435  
Dragonstone greaves  1  Common^{[2]}  4,645,945  
Dragonstone gauntlets  1  Common^{[2]}  3,807,754  
Dragonstone boots  1  Common^{[2]}  5,141,810 
 ^ 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 6,208. (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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