I mean, I've purchased probably 20 stones mostly off ebay, some on Etsy. Every single one of them performs fabulessly. Yes, a few sellers sent me some rocks with some bad veins in them but they are easily dealt with. The suita's you have to be careful with when buying, they are the worst offenders!! Just about everything under $400 from 330mate on e bay has toxicities. I wouldn't touch any of the Karasu or suita he is selling.:nono: