Crystal chest
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Release date | 27 February 2002 (Update) |
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Members? | Yes |
Quest? | No |
Location | Taverley |
Examine | A crystal key can open it. |
The crystal key chest is a treasure chest in Taverley that is famous for containing uncut dragonstones, among other things. The chest, located in Ivy Sophista's house, is locked and can only be opened by a crystal key. The crystal key is made up of a loop half of a key and the tooth half of a key; you can make the crystal key by using them with each other, or selecting the "Assemble" option. 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.
Attempting to open the chest without the crystal key yields the message: "This chest is securely locked shut."
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 a Crystal ward or a crystal bow from the chest. The chest does not contain either of these items, as they are a quest reward.
PossibilitiesEdit
Possibility 1 - Fruit tree seedEdit
The expected value of Possibility 1 is 64,241, which is a profit/loss of -2,182 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Calquat tree seed 1 Common ^{[1]} 13,868 Papaya tree seed 1 Common ^{[1]} 66,407 Palm tree seed 1 Common ^{[1]} 133,732
- ^ ^{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 87,137, which is a profit/loss of 20,714 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Lantadyme seed 2 Always 71,542
Possibility 3 - Grimy torstolsEdit
The expected value of Possibility 3 is 35,749, which is a profit/loss of -30,674 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Grimy torstol 2 Always 20,154
Possibility 4 - RunesEdit
The expected value of Possibility 4 is 107,195, which is a profit/loss of 40,772 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Law rune 50 Always 20,450 Chaos rune 50 Always 2,250 Cosmic rune 50 Always 15,600 Death rune 50 Always 9,550 Nature rune 50 Always 14,750 Body rune 200 Always 3,400 Mind rune 200 Always 1,600 Earth rune 200 Always 4,000 Air rune 200 Always 6,400 Water rune 200 Always 6,800 Fire rune 200 Always 6,800
Possibility 5 - Iron oreEdit
The expected value of Possibility 5 is 75,395, which is a profit/loss of 8,972 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Iron ore 200 (noted) Always 59,800
Possibility 6 - CoalEdit
The expected value of Possibility 6 is 53,845, which is a profit/loss of -12,578 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Coal 150 (noted) Always 38,250
Possibility 7 - Rune barsEdit
The expected value of Possibility 7 is 58,510, which is a profit/loss of -7,913 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Rune bar 3 Always 42,915
Possibility 8 - GemsEdit
The expected value of Possibility 8 is 48,514, which is a profit/loss of -17,909 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Uncut diamond 3 Always 19,599 Uncut ruby 3 Always 13,320
Possibility 9 - Loop half of a keyEdit
The expected value of Possibility 9 is 49,517, which is a profit/loss of -16,906 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Loop half of a key 1 Always 18,922 Coins 15,000 Always Not sold
Possibility 10 - Tooth half of a keyEdit
The expected value of Possibility 10 is 71,863, which is a profit/loss of 5,440 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Tooth half of a key 1 Always 41,268 Coins 15,000 Always Not sold
Possibility 11 - Rune platebodyEdit
The expected value of Possibility 11 is 53,901, which is a profit/loss of -12,522 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Rune platebody 1 Always 38,306
Possibility 12 - Rune platelegs or plateskirtEdit
The expected value of Possibility 12 is 53,113 for male characters and 53,211 for female characters, which is a profit/loss of -13,310 for male characters and -13,212 for female characters, if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Rune platelegs 1 Common ^{[1]} 37,518 Rune plateskirt 1 Common ^{[1]} 37,616
- ^ ^{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 25,836,631, which is a profit/loss of 25,770,208 if buying the crystal key on the GE.
- Receiving this possibility is very rare.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 15,595 Dragonstone helm 1 Common ^{[1]} 19,420,923 Dragonstone hauberk 1 Common ^{[1]} 46,854,862 Dragonstone greaves 1 Common ^{[1]} 27,693,252 Dragonstone gauntlets 1 Common ^{[1]} 17,116,490 Dragonstone boots 1 Common ^{[1]} 18,019,653
- ^ ^{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
- The probabilities in this section are an estimation based on the data of 1134 crystal chest loots, while wearing a ring of wealth.
Possibility | Percentage |
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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 -3,788. (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.