METAL; 14k Gold. MEASUREMENTS: Ring size - 8 3/4, ring top is 25mm x 19mm. GEMSTONES: Opal - 14mm x 12mm, topped with crystal. Diamonds - approx. 0.90ctw, Sapphires. MARKED: k14. WEIGHT: 8.1 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.