Valuable and Safe-to-wear: Jadeite jade is rarer and more expensive than Nephrite, and its value increases overtime. Grade A means the jade is NOT treated by chemicals, thus is safe for your skin, compared to Grade B & C jade. Authenticity: Each piece comes with a certificate by China's National Testing Center which is more authoritative in certifying jade than G.I.A. of the U.S.A. The certificate can be verified online instantly. Due to the nature of jade, each piece varies slightly by size, weight, and color from the image. Meaning: Jadeite jade is believed to have healing power and wards off evil spirits. Dimension: Due to the nature of jade, each piece varies slightly by design, size, weight, and color from the image. Please compare to the US quarter coin reference in the product picture. The bracelet is 7"/8", with 12mm beads. The rope is elastic. RISK FREE: Covers all defects and damages with no-question-asked return policy