METAL: 18k Gold/ Platinum. MEASUREMENTS: Earrings are 25mm x 16mm. GEMSTONES: White diamonds - approx. 1.12ctw, Yellow diamonds - approx. 0.37-0.39ct each. MARKED: pt950, 31756626, T & Co, Au750. WEIGHT: 8.1 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.