Diablo 3 - Cost Gem This is a free program for Android that uses the price of tomes of secrets and flawless square gems to calculate the price for higher level gems. It will also show you the minimum price that you should sell them to not lose money at the Auction House. I hope you find it useful and I really appreciate any feedback or requests. Thank you. PD: I don't know if this is the right place for this post, if it isn't please mods move me to where it belongs.