Do kovarex-esque chemistry with compressed ore balls to transform ores into each other at a slight loss. An extremely easy way to turn your ores into each other :)

Dissolving ore into essence gives you the materials to turn more ore into essence, which can then be fused back into ore of any type with the right combination of essences.

This is meant to enable ore type exchanges without being free or post-game tech, so the price i decided would be fun to pay is logistics and complexity overhead.