A women's ring, detailed and decorative, moderately ornate. High-end photorealistic fine-jewelry rendering of a single 1.90 carat marquise-cut diamond mounted east-to-west on a 2.0 mm wide, perfectly flat 18k yellow-gold band. Preserve a true elongated marquise silhouette with sharply pointed east and west tips and elegant curved sides; do not make the stone oval, cushion-like, rounded, or excessively wide. The diamond should dominate the design and appear almost visually unsupported from the face-up view. The diamond should sit as close to the finger-facing plane of the band as the pavilion geometry safely permits. Use a minimal hidden under-gallery bridge directly beneath the pavilion rather than a raised basket or cathedral-style support." Use two exceptionally tiny yellow-gold point claws at the extreme east and west tips. The claws should be delicate, narrow, rounded, and tightly follow the diamond's points, capturing only the minimum amount of girdle necessary. They should visually disappear into the diamond rather than read as large prongs, beads, diamonds, hooks, or metal caps. No bulbous tips, no triangular gold shapes, no oversized prongs. The flat shank should transition smoothly and continuously into the tiny point claws without raised shoulders, decorative curves, upward hooks, or bulky metal. Keep the entire face-up outline of the marquise unobstructed. Conceal any additional structural support beneath the pavilion. The support may widen underneath the stone as necessary for a secure daily-wear mounting, but it must remain hidden behind the diamond from the face-up view. Do not expose a large basket, gallery rail, halo, bezel, or decorative under-gallery. Keep the ring extremely low-profile while maintaining realistic pavilion clearance and physically plausible construction for a 1.90 ct marquise diamond. The diamond must not appear literally unsupported when viewed from the side. Show the exact same ring in three views: straight-on face-up, 3/4 perspective, and true side/profile. Maintain identical diamond proportions, orientation, scale, band width, and setting architecture in all views. Photorealistic luxury jewelry photography, realistic diamond proportions and pavilion depth, realistic 18k gold thickness, accurate jewelry construction, understated contemporary architectural design.