Hardened dragon bones

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.

Cost and XP analysis

• 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 207,800,899.
  • Additionally the first bone would take them straight to level 5 Prayer.
  • Using the ectofuntus would cost 181,825,787, but would take far longer to do. Simply burying the bones would cost 727,303,147.

v • d • e Adamant dragon
Monster	Adamant dragon
Exclusive drops	Forcae's journal  Forcae's journal page  Hardened dragon bones  Sakirth's journal  Strisath's journal  Kalibath's journal  Phalaks' experiment log
Locations	Adamant dragon dungeon Dragonkin Lair
Related	Forcae Mural

v • d • e Bones and ashes
Standard bones	Bones  Burnt  Wolf  Bat  Big  Dagannoth  Airut
Dragon bones	Baby dragon  Dragon  Wyvern  Hardened  Frost  Reinforced
Monkey bones	Karamjan  Small zombie  Large zombie  Gorilla  Bearded gorilla  Small ninja  Medium ninja  Skeleton monkey
Bandosians' bones	Jogre (Burnt • Pasty • Marinated • Badly marinated)  Zogre  Fayrg  Raurg  Ourg  Graardor
Unique bones	Ancient  Troll lieutenant  Troll general  Grotesque  Shaikahan  Convention
Bonemeal	Bones  Burnt  Wolf  Bat  Big  Dagannoth  Airut  Baby dragon  Dragon  Wyvern  Frost dragon  Hardened dragon  Reinforced dragon  Monkey  Small zombie monkey  Large zombie monkey  Gorilla  Bearded gorilla  Small ninja monkey  Medium ninja monkey  Skeleton monkey  Jogre  Burnt jogre bones  Zogre  Fayrg  Raurg  Ourg  Shaikahan
Special bones	Curved  Long  Chewed  Mangled
Demonic ashes	Impious  Accursed  Infernal  Tortured  Searing
Related articles	Calculator Cremation