Fluorapatite

Small amounts are found in human teeth.
Overview
Fluorapatite is a mineral that can be found in the Frozen Geode and the Omni Geode. It is one of the geode minerals that can be obtained by cracking open geodes, and it is primarily notable for its use in tailoring and dyeing rather than for any direct crafting or bundle progression.
Fluorapatite is not used in any bundles and is not used in any recipes. Its main gameplay uses are:
- It can be placed in the spool of the Sewing Machine to create the Bandana Shirt.
- It can be used in dyeing as a purple dye at the dye pots in Emily and Haley's house at 2 Willow Lane.
Because it has no bundle or recipe requirements, Fluorapatite is generally safe to sell or hold until needed for clothing or dye-related uses. Players who enjoy tailoring may want to save at least one copy for the Sewing Machine, especially if they are collecting clothing options or experimenting with shirt creation.
Official description
Small amounts are found in human teeth.