4 Carat S925 Sterling Silver Blue Zirconia VVS1 Definition Horse Eye Ring，5A+ Grade High Carbon Zirconia，High Quality Jewelry，March Birthday Stone，Blue Stone Ring，Wedding Ring，Engagement Ring，Christmas Gift，Birthday Gift，Anniversary

[High Carbon Zirconia]: Mainly Composed of Carbon Atoms, Produced through Modern High-Tech Ion Migration Technology, with a Layer of Synthetic Carbon Film on the Surface. The Hardness of High Carbon Zirconia Is 8, and the Fire Power and Texture Are Similar to That of Moissanite. Strictly Select Grade 8A VVS1 Clarity to Present the Best Fire Power and Luster. It Has Excellent Cutting Performance and Can Maximize the Reflective Luster of High Carbon Zirconia.