Board Thread:Questions and Answers/@comment-7656144-20130331131151/@comment-41.135.11.227-20130331144150

Well, 1 redstone = 64 emc, and a lava cell is worth 128 emc, so you douvle your emc. Also, one lava cell in a geothermal generator produces 20,000 eu, i would think it might be profitable, only if you have a lot of resources, as it would take a long time to regain all the emc it took to make the amulet.