Disassembly furnace, essence... hmm... I may be mistaken but this reminds me of Thaumcraft mod in Minecraft. The essence stone too, in Thaumcraft it was crystallized essence.
Crystallized Essence is an item added by the Thaumcraft 4 mod. Contains 1 Aspect only, and a variety of Crystallized Essence exists for all Aspects. Created by feeding 1 Essentia into an Essentia Crystallizer or by smelting mobs in Liquid Death. Can be smelted in an Alchemical Furnace back to 1 liquid Essentia.
This item has two main uses: firstly, that Crystallized Essence of the same aspect stacks up to 64 as an ordinary item and is therefore easier to handle in a storage system. Secondly, because each such item produces one and only one of a specified aspect, it makes performing Alchemy in a Crucible much easier; the player can insert only the exact amounts of each aspect they need, with no waste. (Yes, I copied it from ftbwiki)