13 Carat J SI2 Cushion Cut Diamond Ring
The center stone is a 13.01-carat J SI2 Cushion cut natural diamond, GIA certified (Rosenberg ref. 700699). Cushion cut diamonds at this carat weight are rarely encountered in trade — thirteen carats represents a threshold at which supply becomes structurally constrained across all shape categories, and well-proportioned examples require exceptional rough crystal geometry to yield correct optical symmetry. The J color grade places this stone at the upper boundary of the near-colorless range on the GIA D-to-Z scale.
GIA Color and Clarity: J on the D-to-Z Scale, SI2 Clarity
On the GIA D-to-Z color scale, J marks the transition between the near-colorless range (G–J) and the faint range. At this carat weight, J color exhibits a subtle warmth noticeable in direct comparison to whiter stones but reads as white face-up in most ambient lighting environments. SI2 clarity indicates slight inclusions detectable under 10× magnification; at 13 carats, the nature and position of clarity characteristics become consequential, and GIA certification provides the authoritative record for any independent evaluation.
Why Cushion Cut for a Large White Diamond
The Cushion cut derives from the Old Mine cut tradition, combining a rounded square-to-rectangular outline with a hybrid brilliant facet arrangement. Its larger facets and deeper pavilion produce a softer, more diffused light return than a round brilliant — a property well suited to large white diamonds, as it moderates the scintillation intensity that can make color and clarity characteristics more perceptible at significant carat weights. The absence of sharp corners also reduces mechanical stress at prong contact points relevant to a stone of this mass.
Platinum Micropavé Setting
The ring is handmade in platinum, with micropavé diamond detailing set along the shank. Micropavé positions small, precisely matched diamonds in closely spaced bead-set configuration, producing continuous surface coverage with minimal visible metal between stones. Platinum’s 95% purity, density, and long-term resistance to prong wear make it the standard metal for settings housing stones of this caliber — the micropavé shank proportionally frames the center stone without generating competing visual weight.
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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.