Necklace is made of Natural Color Chinese Freshwater Cultured Pearls. The clasp on the pearl strand is rhodium plated sterling silver. Pendant Discription: Origin: Oregon Gem Type: Sunstone/Diamonds Color: Rootbeer/White Shape: Marquis/Round Cut: Concave/Standard Size (mm): 23.5x12x8.5/? Weight (ct): 12/.94tcw Grade*: AA/G to H Clarity**: SI/VS Lustre: Schiller MOHS Hardness: 6.5-7/7 / 10 Treatment: Non-treated/Non-treated Metal: 18K White Gold Other: The pendant has an enhancer bale. GbG ID: S601KPP To learn more about Sunstone Grading System