Pt900 Blue Topaz 13.20ct It's difficult to see in the photo, but the surface of the blue topaz is cut in an S-shape. Size of the blue topaz only: Length: 17.8mm Width: 13.1mm Width of the ring's lower part: 3.5 mm Weight: 9.4g Size: 12.1 (Japanese ring size) If you need an appraisal certificate, it will cost an additional ¥2,000. If you are interested, please send me a message. m(__)m