Large fossilised ribs

Large fossilised ribs
Released							7 September 2017 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							No
Equipable							No
Stackable							No
Noteable							No
Options							Drop
Examine							This set of fossilised ribs belongs in a museum!
Values
Value							1 coin
High alch							0 coins
Low alch							0 coins
Weight							0.907 kg
Advanced data
Item ID							21604

The large fossilised ribs are a fossil that can be obtained by cleaning an unidentified large fossil on the fossil cleaning bench east of the Museum Camp on Fossil Island.

Uses

The large fossilised ribs are one of the five fossils used to complete one of the five sub-displays making up the Leviathan in the Varrock Museum's paleontology exhibit.
The other fossils required are the large fossilised limbs, spine, pelvis, and skull.
Each large display completed will give an antique lamp that gives 5,000 experience in any skill that is level 35 or higher, along with 2 kudos.

In addition, they can be used at the mycelium pool to be calcified into a large enriched bone via a chemical process that uses pyrophosphite and calcite. Whilst the reaction is happening in the pool, players must add additional pyrophosphite and calcite to maintain the chemical process, and pop bobbing fossils that surface around the pool, otherwise the fossils will become too exposed to air and dissolve. Once completed, players can open the sluice gate behind the Ancient Shroom, and check the rinsing pool to obtain the enriched bones. They are then used on the easternmost strange machine in the House on the Hill for 1500 Prayer experience.

Lastly, they can be used to give the ancient wyvern shield three charges, or traded to the Fossil Collector in exchange for 300 numulites.

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