#31 • Important AGL-Certified 4.47ct Burma No-Heat Sapphire & Diamond Three-Stone Ring in Platinum

Part of $2.8 Million McLean Mansion Luxury Downsizing Auction (timed auction by Prime Auction Solutions)

Status: Sold

Sapphire (Burma, no heat) 4.47cts & diamond .25cts; platinum; AGL certified n exceptional and important investment-grade ring centering a cushion-cut natural Burma sapphire of 4.47 carats, certified by AGL (American Gemological Laboratories) as Burmese in origin with no evidence of heat treatment. Untreated Burma sapphires represent the pinnacle of sapphire collecting — a category of gemstone increasingly rare on the market and among the most sought-after by serious collectors and investors. The stone displays the velvety, slightly violetish-blue hue that has made the Mogok Valley sapphires of Burma legendary for over a thousand years, with the crystalline transparency and inner glow that only fine untreated material achieves. The sapphire is four-prong set in a classic three-stone configuration, flanked by two tapered baguette diamonds totaling approximately 0.25 carats. The crisp, step-cut white diamond shoulders create the architectural symmetry of the timeless three-stone silhouette while keeping all attention focused on the magnificent center stone. Together, the gemstones reach a combined weight of approximately 4.72 carats. Crafted in solid platinum, the ring features a slim, polished cathedral shank that lifts the sapphire proudly from the finger and tapers comfortably to the band. Platinum is the connoisseur's choice for fine sapphire jewelry — its naturally white tone preserves the true color of the gemstone without the warm cast that yellow gold can introduce, and its strength provides the most secure long-term setting for stones of this caliber. The shank is hallmarked, and the ring is accompanied by its AGL certification documenting the origin and no-heat status. Burma sapphires of this size and quality with no-heat AGL certification are landmark stones — pieces that anchor collections and historically appreciate significantly over time. A rare opportunity for the discerning collector. Center stone: Cushion-cut natural Burma sapphire, 4.47 cts, no heat, AGL certified. Side stones: Two tapered baguette diamonds, approx. 0.25 cts total. Total gemstone weight: approx. 4.72 cts TGW. Mounting: Platinum. Accompanied by AGL origin and treatment certification. Ring Size: 4.75 - 5.0