Gold ring, Au 750/1000 (18K yellow gold). 18K yellow gold ring with solitaire diamond. Gentle engagement ring. Gemstone characteristics: Type: Genuine, natural gemstone - diamond. Country of origin: South Africa. Carat weight: 0.019 ct. Round (brilliant) cut, faceted. Diameter ca 1.64 mm. Color: G. Clarity: VS1. Luster: Excellent. Hardness: 10.0 Mohs. Specific gravity: 3.53. Refractive index: 2.417 - 2.419. Manual sorting grade. We provide a commercial certificate. Jewelry is thoroughly checked and hallmarked by the State Assay Office (Official State Authority). 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. Pattern width approx. 3.8 mm.