Crystal chest

The Crystal chest is the unofficial name of a treasure chest in Taverley that is famous for containing a dragonstone, among other things. The chest 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 acquire the crystal key by using them with each other. 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."

Value analysis and Contents
The chest loot always includes an uncut dragonstone and will normally include another random reward, but not always. Below are the values of the chest's contents, based on current G.E. prices. Most times you have a 9 out of 16 chance to make a profit, or a 56.25% chance, however this can fluctuate due to the price of the crystal key. A Ring of Wealth does not affect your chances because it is not a drop from a monster, thus no rare drop table. The frequencies below are based on a batch of 1750 keys. There are theories floating around about only being able to obtain Rune Platelegs if you are a male character, and Rune Plateskirts if you are female. Presumably the chance is equal to get either of them. These tests were done on a Male Character, so there were actually no Rune Plateskirts achieved.


 * {|width="90%" class="wikitable sortable"

!style="width:200px" class="unsortable"|Image !class="unsortable"|Possible loot !style="width:100px"|Profit/Loss !style="width:100px"|Frequency (Approx.)
 * uncut_dragonstone.gifSpinach_roll.PNGCoins 1000.png
 * Uncut dragonstone, spinach roll, and 2000 coins
 * 27.6%
 * uncut_dragonstone.gifAir_Rune.PNGBody_Rune.PNGEarth_Rune.PNGFire_Rune.PNGMind_Rune.PNGWater_Rune.PNGChaos_Rune.PNGCosmic_Rune.PNGDeath_Rune.PNGNature_Rune.PNGLaw_Rune.PNG
 * Uncut dragonstone, 50 of each elemental rune, 50 body and mind runes, 10 of all other runes, excluding blood, astral, and soul runes
 * 10.1%
 * uncut_dragonstone.gifCoins 250.pngHalf_key_l.PNG
 * Uncut dragonstone, loop half of a key, and 750 coins
 * 4.6%
 * uncut_dragonstone.gifCoins 250.pngHalf_key_t.PNG
 * Uncut dragonstone, tooth half of a key, and 750 coins
 * 3.4%
 * uncut_dragonstone.gifRunite_bar.png
 * Uncut dragonstone and 3 runite bars
 * 9.5%
 * uncut_dragonstone.gifCoal.png
 * Uncut dragonstone and 100 coal (noted)
 * 8.6%
 * uncut_dragonstone.gifIron_Ore.PNG
 * Uncut dragonstone and 150 iron ore (noted)
 * 7.8%
 * uncut_dragonstone.gif
 * Uncut dragonstone
 * 11.9%
 * uncut_dragonstone.gifBones.png
 * Uncut dragonstone and bones
 * 0% (None obtained)
 * uncut_dragonstone.gifCoins 1000.pngRaw swordfish.PNG
 * Uncut dragonstone, 5 raw swordfish, and 1000 coins
 * 6.3%
 * uncut_dragonstone.gifRune-platelegs-inv.png
 * Uncut dragonstone and rune platelegs
 * 0.7%
 * uncut_dragonstone.gifRune-plateskirt-inv.png
 * Uncut dragonstone and rune plateskirt
 * 0.7%
 * uncut_dragonstone.gif[[File:Adamant square shield.png]]
 * Uncut dragonstone and adamant sq shield
 * 1.7%
 * uncut_dragonstone.gifUncut_sapphire.gifCoins 1000.pngSpinach_roll.PNG
 * Uncut dragonstone, uncut sapphire, 2000 coins, and a spinach roll
 * 0% (None obtained)
 * uncut_dragonstone.gifRuby.gifDiamond.gif
 * Uncut dragonstone, 2 cut rubies, and 2 cut diamonds
 * 7.7%
 * uncut_dragonstone.gifDragonstone.gif
 * Uncut dragonstone and cut dragonstone
 * Uncut dragonstone, 5 raw swordfish, and 1000 coins
 * 6.3%
 * uncut_dragonstone.gifRune-platelegs-inv.png
 * Uncut dragonstone and rune platelegs
 * 0.7%
 * uncut_dragonstone.gifRune-plateskirt-inv.png
 * Uncut dragonstone and rune plateskirt
 * 0.7%
 * uncut_dragonstone.gif[[File:Adamant square shield.png]]
 * Uncut dragonstone and adamant sq shield
 * 1.7%
 * uncut_dragonstone.gifUncut_sapphire.gifCoins 1000.pngSpinach_roll.PNG
 * Uncut dragonstone, uncut sapphire, 2000 coins, and a spinach roll
 * 0% (None obtained)
 * uncut_dragonstone.gifRuby.gifDiamond.gif
 * Uncut dragonstone, 2 cut rubies, and 2 cut diamonds
 * 7.7%
 * uncut_dragonstone.gifDragonstone.gif
 * Uncut dragonstone and cut dragonstone
 * uncut_dragonstone.gifUncut_sapphire.gifCoins 1000.pngSpinach_roll.PNG
 * Uncut dragonstone, uncut sapphire, 2000 coins, and a spinach roll
 * 0% (None obtained)
 * uncut_dragonstone.gifRuby.gifDiamond.gif
 * Uncut dragonstone, 2 cut rubies, and 2 cut diamonds
 * 7.7%
 * uncut_dragonstone.gifDragonstone.gif
 * Uncut dragonstone and cut dragonstone
 * 7.7%
 * uncut_dragonstone.gifDragonstone.gif
 * Uncut dragonstone and cut dragonstone
 * Uncut dragonstone and cut dragonstone

0% (None obtained)
 * }

Based on the above table, the average loss from opening the chest is: Male player:. Female player:.

Crystal chest