Gold ring, Au 375/1000 (9K white gold). Classic engagement ring in white gold. Timeless jewel with a beautiful, solitaire diamond. Manual sorting grade. Commercial certificate. Jewel is inspected by State Assay Office (official state authority). Gemstone characteristics: Type: Genuine, natural gemstone - diamond. Country of origin: South Africa. Carat weight: 0.37 ct. Round, brilliant cut, faceted. Diameter ca. 4.56 mm. Color: Gentle, pinky-brown (fancy brown). Clarity: I1. Luster: Excellent. Hardness: 10.0 Mohs. Specific gravity: 3.53. Refractive index: 2.417 - 2.419. 6-prong setting optically emphasizes and increases diamond´s size. Avoid cleaning diamond jewelry with solution containing ammonia (cleaning is recommended with mild soap and soft cloth only, then dry on blotting background). Do not expose diamond jewelry to temperatures over 300 °C. Width of the band ca. 2.5 mm.