Item Specifications: Metal Type: Sterling Silver. Metal Stamp or Hallmark: .925 Metal Purity: 92.5% Sterling. Gemstone Creation Method: Simulated. Face Measurements From South To North: 12mm(0.47")Center Stone Measurements: 7mm(0.27")Approximate Center Stone Carat Weight: 1.28 Carat Halo Engagement Ring Round, Face Measurements, Round Halo Engagement Rings, Engagement Ring Round, Engagement Rings Round, Art Deco Wedding, Halo Engagement Ring, Halo Engagement, Bridal Rings