Hardened dragon bones

Hardened dragon bones
Detailed
Release	15 June 2015 (Update)
Members	Yes
Members	Yes
Quest item	No
Quest item	No
Tradeable	Yes
Tradeable	Yes
Equipable	No
Equipable	No
Stackable	No
Stackable	No
Disassembly	Yes
Disassembly	Yes
Noteable	Yes
Noteable	Yes
Value	1 coin
Value	1 coin
High Alchemy	0 coins
High Alchemy	0 coins
Low Alchemy	0 coins
Low Alchemy	0 coins
Destroy	Drop
On death	Reclaimable
On death	Reclaimable
Reclaim	1
Reclaim	1
Sacrifice	4
Sacrifice	4
Exchange	10,861 coins (info)
Buy limit	10,000
Weight	4.222 kg
Examine	Tougher than average dragon bones.
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Hardened dragon bones are obtained as a drop from adamant dragons and gemstone dragons. Hardened dragon bones give 144 Prayer experience when buried, 576 Prayer experience when offered at the Ectofuntus, or 504 Prayer experience when offered at a gilded altar with 2 burners lit.

Disassembly

Disassembly XP	1.7
Item quantity required	1
Material count	2
Base junk chance	?  37.3% Your actual junk chance depends on your junk chance reduction researched. See the table below for all values, and Junk for more information. Reduction Junk chance None 1 37.3% 1 34 37.0% 2 49 36.2% 3 64 35.5% 4 69 34.7% 5 78 34.0% 6 83 32.9% 7 91 32.1% 8 95 31.0% 9 105 29.9%
Possible materials
Often
Organic parts	98%
Rarely
Pious components	2%

Defined properties:

All Junk chance: 37.3 Junk chance: 37.3

[FAQ] • [doc]

Drop sources

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For an exhaustive list of all known sources for this item, see here.

Source	Combat level	Quantity	Rarity
Adamant dragon	116	1	Always
Dragonstone dragon	119	1	Always
Dragonstone dragon (Dragonkin Laboratory)	111	1	Always
Hydrix dragon	133	1	Always
Hydrix dragon (Dragonkin Laboratory)	118	1	Always
Onyx dragon	126	1	Always
Onyx dragon (Dragonkin Laboratory)	114	1	Always
Falador resource bundle	N/A	1	Unknown

Cost and XP analysis

	Bury	Gilded altar or Chaos Temple	Ectofuntus	Cremation
Experience	144	504	576	648 (Total)	360 (Prayer) + 288 (FM)
Cost per XP	−75.4	−21.5	−18.9	−16.8 (Total)	−30.2 (Prayer) or −37.7 (FM)

• It is assumed that two burners are lit while using the gilded altar and does not include the cost of clean marrentill.

Trivia

• On release, hardened dragon bones were called adamant dragon bones as only adamant dragons dropped them, with the examine text "Dragon bones infused with adamantite ore." They were changed to their current name on 10 April 2017 due to gemstone dragons sharing the same bone drop.
• A player choosing to use hardened dragon bones all the way from 1-99 Prayer, using a gilded altar with lit burners and no other experience boosts, would, if all the bones were bought at the current medium price on the Grand Exchange, spend 280,886,816.
  • Additionally the first bone would take them straight to level 5 Prayer.
  • Using the ectofuntus would cost 245,775,964, but would take far longer to do. Simply burying the bones would cost 983,103,855.