This jewelry is perfect for an Engagement Ring, Promise Ring, Anniversary Ring, Wedding Ring, Birthday Gift, Christmas gift. Specifications: *Moissanite Diamond simulated laboratory-created *Adjustable Size Ring Carat Weight Size: 1ct. center stone 6.5mm *Side Stone: High-Quality Cubic Zirconia *Diamond Cut: Brilliant *Color Grade: D *Clarity: VVS1 *Cut Grade: Excellent *Metal Material: Solid Sterling Silver *Hallmark: S925 *Product information report: GRA card with ID. *Gift box included Care: jewelry should not be worn when swimming, keep away from chemicals including perfume, hair spray, cosmetics/ lotion, *not responsible for your jewelry maintenance.* Natural moissanite is incredibly rare, so moissanite available today is laboratory-created. After many years of trial and error, the particles Moissan discovered were successfully synthesized to produce what is now one of the world’s most scintillating, durable gemstones. Moissanite ranks 9.25 on the Mohs scale, while diamonds rank 10 on the Mohs scale. While diamonds are slightly harder, moissanite has more fire and brilliance. The Global Gemological Research Association Institute (GRA) has become a trusted source by trade professionals worldwide. GRA has consistently proven reliable in the field of gemstone identification and grading, since 2001.