Bidspirit auction | GIA Certified Pt900 5.21ct Madagascar

GIA Certified Pt900 5.21ct Madagascar Sapphire & 1.01ctw Diamond Ring, Size 5 - Item: One (1) ladies’ halo ring Metal & Fineness: Solid platinum, stamped “Pt900”; fineness confirmed by acid test Gross Weight: 7.6 grams Finger Size: U.S. 5 (resizeable within reasonable limits) Principal Gemstone Species/Variety: Natural corundum (sapphire) Carat Weight: 5.21 carats Cut & Shape: Oval mixed brilliant, well-proportioned; displays excellent brilliance and scintillation Color: Medium-vivid royal blue, evenly distributed Clarity: Eye-clean; minor inclusions observed only under 10× magnification Treatment: Conventional heat only (no diffusion or lattice-additive processes) Origin: Madagascar  - as stated on GIA Report #1232505096 Accent Diamonds Total Carat Weight: 1.01 ctw Round brilliant halo (≈0.56 ctw) Straight baguette shoulders (≈0.45 ctw) Quality Estimate: Color F–G; Clarity VS–SI; well-matched and bright Setting & Craftsmanship Classic platinum halo design. The sapphire is secured by four robust talon prongs. A claw-set ring of near-colorless round diamonds surrounds the center stone, while channel-set baguette diamonds form tapered shoulder panels. High-polish exterior and smooth interior surfaces reflect precise fabrication and professional finishing consistent with fine manufacture. Hallmarks & Marks Interior shank bears “Pt900” hallmark; no maker’s mark observed. Condition Excellent estate condition. Minimal surface wear; no evidence of prior repairs. All gemstones secure, free of visible chips or abrasions. Prongs tight and evenly finished.