Extract from GIA textbook by eClarity | Jul 6, 2018 | Uncategorized | 0 comments Thousands of years ago, people left rough diamonds uncut, especially naturally beautiful octahedrons like this one. Courtesy: GIA. Resource: Amanda. #eClarity Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.