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: 10mm(0.39") Art, Engagement Rings, Metal, Halo Engagement Ring, Round Halo Engagement Rings, Engagement Rings Round, Sapphire Ring, Sterling Silver, 925 Sterling Silver