Houston Auctions does not use stock photos in descriptions, we only use photographs of the actual item listed. Photos are high resolution and may show scratches and other imperfections that may not be eye visible. See photos and “condition description” for sizing information. Precious Metal Purity Testing. All items containing precious metals are authenticated using state-of-the-art x-ray XRF equipment. All diamonds are tested and authenticated using state-of-the-art GIA ID100 diamond testers. Due to highly subjective coin grades, we provide high resolution photos for self-grading. Authenticity All items are guaranteed to be authentic. Legal It is agreed by both parties all legal proceedings will take place in Harris County, TX.