Unidentified medium fossil detail.png

An unidentified medium fossil is a fossil that can be obtained while performing activities on Fossil Island, including:

They can be traded to the Fossil Collector in exchange for 200 numulites.


Before players can clean fossils, they must build the cleaning bench east of the Museum Camp using five planks and five nails, granting 100 Construction experience.

To clean fossils, players must use the unidentified fossil on the fossil cleaning bench while wearing leather boots and leather gloves and in possession of a trowel, rock pick and specimen brush. Players can also clean fossils at the specimen table in the Varrock Museum.

Cleaning unidentified medium fossils will give the player a medium fossilised limbs, spine, ribs, pelvis, or skull. A set of these allows the player to place them in a medium display in the Varrock Museum's paleontology exhibit, located at the bottom floor of the museum, below the natural history exhibit. Doing so will give an antique lamp that gives 3,500 experience in any skill, along with 2 kudos per display.

Dropping monsters

See Fossil Island fossils for strategies on obtaining fossils.

Monster Combat level Quantity Rarity
Deranged archaeologist 276 1 3; Uncommon (12/700=3.4%)
Ancient Wyvern 210 1 3; Uncommon (12/700=1.7%)
Spitting Wyvern 139 1 3; Uncommon (10/700=1.4%)
Taloned Wyvern 147 1 3; Uncommon (10/700=1.4%)
Long-tailed Wyvern 152 1 3; Uncommon (10/700=1.4%)
Ancient Zygomite 109 1 4; Rare (7/700=1%)
Lobstrosity 68 1 4; Rare (5/700=0.71%)
Tar Monster 132 1 4; Rare (5/700=0.71%)
Hoop Snake 19 1 4; Rare (3/700=0.43%)
Ammonite Crab 25 1 4; Rare (3/700=0.43%)


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