Jadeite is globally recognized as one of the traditional jade. Jadeite Jade is also well known as Fei Tsui. Gemstone: 100% Jadeite(Untreated) Clasp: Steel(18K Gold Filled) Note: Certificate of Authenticity Included If you have any questions or concerns, please do not hesitate to contact me. Best regards Mr. Lam, MSc Jewellery Appraiser(NGTC) Gemmologist(Diamond, Jadeite)(NGTC) Coloured Stone Grading & Pricing(AIGS)