Calcite is found in the Mushroom Forest area of Fossil Island. It is used with pyrophosphite on a mycelium pool in order to recalcify fossils into enriched bones, which can then be used on the broken strange machine in the House on the Hill to gain Prayer experience.
Uses
So it appears that the mycelium pool can convert fossils into enriched bones via a chemical process. This uses pyrophosphite and calcite, both gained from several places around the island. Whilst the reaction is happening in the pool you must keep your fossils below the liquid level, as they tend to float. If you don’t do this, you will lose some fossils to the chemical reaction. Once done, you can rinse them off and use them to get prayer experience at another location on the island. [[Category:]]