I recently purchased an engagement ring for my SO and was skeptical that the middle stone I chose from a wholesaler I worked with was not used in the ring. The stone itself was not previously classified and after getting the Center Stone classified by AGL it was revealed that there was a significant difference from the stone quality I paid for. I return the ring for a full refund.
Are there any consumer protection agencies, diamond sales review sites, or other known entities I can use to report this wholesale? I am a native of the United States and do not want others to have this experience.