Heat jars are cool, but how about this (attachement) ?

The pattern is nice (the golden angle is there, among other stuff). I can think of a number of ways to use something so interesting.

do you like it? what do you think it can be used for?

 

looks like it could be used for some kind of heat focus, a type of channel/converging crystal for heat flow due to its spiral shape. 

Edited November 2, 20178 yr by Syrian

adding on to my other comment, sounds like a good concept start to what a heat solidifier would do or look like, a focus that could direct and channel heat into a single place to create a heat stone, using a memory stone to impart the memory of that resource within the item, it would take that memory and the heat and use the memory of the memory stone to direct its outcome. a representation of the process of memory and heat focused into a single object, the representation of the realms memory and the players influence. could also be a little more straight forward in that a circle could be carved into the centre for the memory stone to "sit" and the heat would be directed across the surface of the solidifier and converged evenly through it into the stone.