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 shield 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 58,294, which is a profit/loss of -9,927 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Calquat tree seed 1 Common ^{[1]} 14,284 Papaya tree seed 1 Common ^{[1]} 57,831 Palm tree seed 1 Common ^{[1]} 103,439
- ^ ^{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 106,889, which is a profit/loss of 38,668 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Lantadyme seed 2 Always 90,778
Possibility 3 - Grimy torstolsEdit
The expected value of Possibility 3 is 31,521, which is a profit/loss of -36,700 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Grimy torstol 2 Always 15,410
Possibility 4 - RunesEdit
The expected value of Possibility 4 is 95,861, which is a profit/loss of 27,640 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Law rune 50 Always 14,350 Chaos rune 50 Always 2,050 Cosmic rune 50 Always 13,150 Death rune 50 Always 9,150 Nature rune 50 Always 15,250 Body rune 200 Always 1,400 Mind rune 200 Always 1,000 Earth rune 200 Always 2,800 Air rune 200 Always 4,800 Water rune 200 Always 5,400 Fire rune 200 Always 10,400
Possibility 5 - Iron oreEdit
The expected value of Possibility 5 is 94,111, which is a profit/loss of 25,890 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Iron ore 200 (noted) Always 78,000
Possibility 6 - CoalEdit
The expected value of Possibility 6 is 49,861, which is a profit/loss of -18,360 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Coal 150 (noted) Always 33,750
Possibility 7 - Rune barsEdit
The expected value of Possibility 7 is 59,755, which is a profit/loss of -8,466 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Rune bar 3 Always 43,644
Possibility 8 - GemsEdit
The expected value of Possibility 8 is 47,839, which is a profit/loss of -20,382 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Uncut diamond 3 Always 20,307 Uncut ruby 3 Always 11,421
Possibility 9 - Loop half of a keyEdit
The expected value of Possibility 9 is 51,171, which is a profit/loss of -17,050 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Loop half of a key 1 Always 20,060 Coins 15,000 Always Not sold
Possibility 10 - Tooth half of a keyEdit
The expected value of Possibility 10 is 75,742, which is a profit/loss of 7,521 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Tooth half of a key 1 Always 44,631 Coins 15,000 Always Not sold
Possibility 11 - Rune platebodyEdit
The expected value of Possibility 11 is 54,054, which is a profit/loss of -14,167 if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Rune platebody 1 Always 37,943
Possibility 12 - Rune platelegs or plateskirtEdit
The expected value of Possibility 12 is 53,329 for male characters and 53,446 for female characters, which is a profit/loss of -14,892 for male characters and -14,775 for female characters, if buying the crystal key on the GE.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Rune platelegs 1 Common ^{[1]} 37,218 Rune plateskirt 1 Common ^{[1]} 37,335
- ^ ^{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 26,308,398, which is a profit/loss of 26,240,177 if buying the crystal key on the GE.
- Receiving this possibility is very rare.
Item Quantity Rarity GE Market Price Uncut dragonstone 1 Always 16,111 Dragonstone helm 1 Common ^{[1]} 19,562,130 Dragonstone hauberk 1 Common ^{[1]} 49,280,608 Dragonstone greaves 1 Common ^{[1]} 27,913,655 Dragonstone gauntlets 1 Common ^{[1]} 16,685,388 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 -3,746. (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.