GIA certified 5.35 carat cushion cut Burma sapphire ring in 18K white gold with 1.50 carat diamonds featuring no heat treatment and vintage halo setting. Royal blue sapphire from Myanmar with nearly flawless antique French square cut diamond side stones flanked by baguette cut diamonds and round cut diamond halo, size 4.75, adjustable.

Product Specifications:

• Item Type: Vintage Engagement Ring
• Metal: 18K White Gold
• Size: 4.75 (adjustable with sizing beads)
• Weight: 6.76 grams
• Setting Style: Vintage Halo

Center Stone Details:

• Gemstone: Natural Sapphire
• Carat: 5.35 Carat
• Shape: Cushion Cut
• Color: Deep Blue (Royal Blue)
• Origin: Burma (Myanmar)
• Treatment: No Heat
• Transparency: Transparent

Certification: GIA Report 5231479482

GIA Comments: The color appearance of this stone is described in the trade as "Royal Blue."

Side Stone Details:

• French Square Cut Diamonds (2pcs)
• Baguette Diamonds (2pcs)
• Round Diamond Halo: Surrounding the center stone
• Total Diamond Weight: 1.50 Carats (approximate)
• Color: F-G
• Clarity: VS1-VS2

Measurements:

• Ring Size: 4.75 (with sizing beads, adjustable)
• Center Stone: 9.90 x 8.86 x 6.09mm
• Total Weight: 6.76 grams
• Carat Weight: 5.35ct sapphire + 1.50ct diamonds

This exceptional 5.35 carat Burma sapphire represents the absolute pinnacle of Sapphire quality, exhibiting the legendary "Royal Blue" saturation that defines top-grade gems. The color distribution demonstrates remarkable uniformity across the cushion's faceted surface, with no visible color zoning or secondary hue. The saturation reaches an optimal 85-90% intensity, creating the coveted "Roya Blue" appearance that Burma sapphires are renowned for. Crystal clarity is loupe-clean with minute silk inclusions that actually enhance the stone's lustrous properties by creating internal light diffusion. The brilliance factor is exceptional, with each facet junction creating crisp light return and scintillation patterns typical of perfectly proportioned cushion cuts. Most significantly, the complete absence of heat treatment preserves the sapphire's natural crystal structure, resulting in superior hardness, enhanced pleochroism, and the distinctive fluorescent properties that separate unheated Burma stones from all other origins. And at over 5 carats, this is quite an exceptional gem.

This vintage 18K white gold setting features nearly flawless antique French square cut diamond side stones flanked by precision-cut baguettes, creating sophisticated geometric progression toward the round diamond halo that encircles the sapphire. The secure four-prong mounting showcases the cushion-cut sapphire while allowing maximum light penetration. At 6.76 grams, the substantial construction ensures lasting durability while maintaining refined proportions.