Metal: 925 Sterling Silver Main Stone: 12 natural emeralds, totaling 10.5 carats. The 10 smallest emeralds are approximately 0.7 carats each, while the two largest are approximately 3.5 carats each.The largest oval emerald weighs approximately 2.5 carats. Size: Adjustable size via sliding mechanism. The main stones of this product are 12 natural emeralds with an intense color. Emeralds are typically treated with colorless oil to enhance clarity, which is a common practice internationally and does not affect the nature of the gemstones. This item includes the high-quality leather jewelry box shown in the picture. Shipping: We deliver via UPS, Royal Mail, DPD, and other logistics providers. Delivery times depend on your local postal system, but most orders within Europe arrive within 5 to 7 business days.