Fossils are used inside the Varrock Museum. There are 14 small displays, 12 medium displays, 5 large displays, and 5 plant displays. To complete a display, you’ll need 5 fossils of the appropriate type. In total, players will need to find 70 small fossils, 60 medium fossils, 25 large fossils, and 25 plant fossils. Unidentified large fossils can have a chance to be large fossils or plant fossils. Also, fossils can be used to gain prayer experience in the mycelium pool.  Small Enriched Bones – 500 Prayer Experience  Medium Enriched Bones – 1,000 Prayer Experience  Large Enriched Bones – 1,500 Prayer Experience  Rare Enriched Bones – 2,500 Prayer Experience Futhermore, the Fossil Collector will give numulites in return for identified and unidentified fossils.  Small Bones – 100 Numulites  Medium Bones – 200 Numulites  Large Bones – 300 Numulites  Rare Bones – 500 Numulites