Color: Black Material: Silver This ring has a retro feel from around 1955. The center stone is a sapphire-like stone, which appears black in the photos, but looks deep blue when held up to the light. When the oval-cut center stone is viewed with a loupe, the cut surfaces sparkle beautifully, creating a captivating shimmer. There are delicate carvings on both sides. The carvings are very small and finely detailed. The size is 13.5. There is no silver hallmark, but the back of the setting is also well-finished, making it smooth and very comfortable to wear.