20 Carat D Flawless Emerald Cut Diamond Ring
The center stone is a 20.18-carat D Flawless Emerald cut natural diamond, GIA certified and classified as Type IIa (Rosenberg ref. 95872). Type IIa diamonds contain virtually no nitrogen impurities — a structural condition producing exceptional optical transparency found in fewer than 2% of all gem-quality natural diamonds. At 20 carats with D color, Flawless clarity, and Type IIa chemistry, this stone occupies a position where authenticated examples are encountered only at the most rarefied levels of the global diamond market.
GIA Color and Clarity: D and Flawless
D is the highest grade on GIA’s D-to-Z color scale, indicating the complete absence of detectable body color when the stone is viewed face-down against a white background under controlled conditions. Flawless — FL — is GIA’s top clarity designation: no inclusions or blemishes are visible under 10× magnification. The convergence of D color and Flawless clarity in a single stone exceeding 20 carats represents a combination that is structurally scarce in annual GIA grading submissions regardless of market cycle.
Why the Emerald Cut for D Flawless Material
The Emerald cut is a rectangular step-cut with long, parallel facets arranged in a hall-of-mirrors optical structure. Unlike brilliant-cut diamonds, it does not fragment light into dispersed scintillation — instead, it produces broad flashes and deep, still reflections that expose the stone’s interior directly to the eye. At D Flawless, this transparency becomes a defining asset: the step-cut facets act as an unobstructed window into a chemically pure crystal. The Emerald cut is the most demanding format for colorless, internally clean material, and the most revealing of a stone’s true quality.
Platinum Solitaire Construction
The diamond is mounted in a handmade platinum solitaire setting. Platinum’s density and 95% purity make it the appropriate metal for a prong configuration at this weight — the prongs must maintain structural integrity over decades of wear without introducing color cast beneath a D-grade stone. The solitaire format places no competing elements alongside the center diamond, ensuring that the stone’s optical character remains the undivided focus of the ring.
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Care
Preserve the brilliance of your diamond through proper care. We recommend professional cleaning annually and safe storage in a jewelry box or pouch. Avoid exposure to harsh chemicals and extreme temperatures. Learn more about our complete care guide for detailed maintenance and storage best practices.
Warranty
Every Rosenberg piece comes with a warranty covering craftsmanship and authenticity. Our warranty protects against manufacturing defects and ensures your diamond’s certified quality. For warranty details, claims, or to register your purchase, contact our specialists.
Delivery
Your diamond is shipped via insured, tracked delivery with full insurance coverage included. Packages are carefully packaged in premium materials and require a signature upon delivery. Review our shipping and delivery policy for complete details about timelines and handling.