Fire Opal

A rare variety of opal, named for its red spots.
Overview
Fire Opal is a mineral that can be found in Magma Geodes and Omni Geodes. As with other minerals, it is primarily obtained by cracking geodes open rather than through farming or mining directly. Its main value is in crafting-related uses rather than as a general-purpose resource.
Fire Opal has two notable uses. It can be placed in the spool of the 


Because it is tied to both geodes and tailoring, Fire Opal is worth keeping at least one copy of if you enjoy fashion items or dye options. If you are short on inventory space, it is still a mineral that is usually more valuable for its special uses than for selling immediately.
Official description
A rare variety of opal, named for its red spots.