Natural 5.24 ct Madagascar Blue Sapphire & 0.68 ct Diamond 18K White Gold Halo Ring, SGL Report No. 250307H-SB

A striking 18K white gold ring centered by a 5.24 carat natural, earth mined oval-cut blue sapphire with vivid color and substantial presence. The sapphire is accompanied by SGL Gemstone Identification and Origin Report No. 250307H-SB, dated March 26, 2025.

The report identifies the gemstone as corundum, sapphire variety, measuring 10.61 × 9.04 × 6.10 mm, and states the opinion that its country of origin is Madagascar. The report notes indications of thermal enhancement, a common and stable treatment for sapphire.

A halo of round brilliant-cut diamonds surrounds the center stone, with additional diamonds set along the split shoulders and beneath the gallery. The diamonds total approximately 0.68 carat, graded approximately G color and VS clarity. The elevated setting allows the sapphire to rise prominently above the halo while the open gallery adds light and dimension.

Details:

Center gemstone: Natural sapphire, earth mined
Weight: 5.24 carats
Cut: Oval
Color: Blue
Geographic origin: Madagascar, as stated in SGL Report No. 250307H-SB
Treatment: Indications of thermal enhancement, as stated in the report
Measurements: 10.61 × 9.04 × 6.10 mm
Report: SGL No. 250307H-SB
Diamond weight: Approximately 0.68 total carat
Diamond quality: Approximately G color, VS clarity
Metal: 18K white gold
Design: Diamond halo with split diamond-set shoulders
Top measurement: Approximately 13.31 mm
Shank width: Approximately 2.55 mm at the back
Ring weight: Approximately 6.71 grams
Ring size: 6.5
Quantity available: One