Platinum ring, Pt 950/1000 (platinum 950). Classic engagement ring from the most luxurious material - Platinum 950. With a spectacular, huge, blue solitary diamond. Luxury ring with seductive silhouette and solitair, impressive blue diamond. Exclusive timeless beauty with the hallmark of elegance. Romantic jewel is perfect for a declaration of love. Classy ring for a woman loving exceptional jewelry. 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: 0.580 ct. Round, brilliant cut, faceted. Diameter ca. 4.99 mm. Color: Wonderful, dark blue - "Titanic blue" (fancy). Clarity: SI3 (small inclusions, confirming the authenticity of diamond, are very difficult to spot with the naked eye, detectable under a magnifying glass with a minimum 10X magnification, inclusions do not impair the brightness and sparkle of the diamond). Luster: Excellent. Hardness: 10.0 Mohs. Specific gravity: 3,53. Refractive index: 2.417 - 2.419. 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. 2.1 mm.