Thank you for viewing this item. This is a K18 pendant head featuring a 6x4mm pear-shaped blue topaz. It's a beautiful pear-shaped topaz with a lovely blue color. The chain is sold separately. If you need one, please order it in the comment section. Also, if you have any requests for sorting or other certifications, please leave a message in the comments, and we will do our best to accommodate you. Please understand that natural stones may have inclusions or very minor scratches. P.CODE-BT01