Cabochon Ruby and Trilliant Diamond Three-Stone Ring

This is a significant three-stone cocktail ring featuring a large, oval-cut ruby cabochon as the central focal point. The ruby displays a deep, saturated pigeon-blood red hue with some internal translucency and visible inclusions, characteristic of natural corundum. It is securely held by four sets of double-wire prongs in a white metal setting, likely 14k or 18k white gold or platinum. Flanking the central stone are two trilliant-cut secondary stones, which appear to be diamonds or high-quality white sapphires, also prong-set to maximize light entry. The central ruby is of substantial size, approximately 8-10 carats by visual estimation. The overall construction suggests Mid-Century Modern or late vintage styling, prioritizing the size and color of the gemstones over ornate filigree. The metal shows minor surface abrasions consistent with regular wear, though the stones appear well-maintained with no significant chips or fractures visible on the crown. The craftsmanship is of high professional quality, featuring a balanced tripartite design that provides a bold aesthetic. No visible hallmarks are present in this view, though they would likely be found on the interior of the shank.

Upon visual examination of this three-stone cocktail ring, I find it to be a significant example of mid-to-late 20th-century fine jewelry. The centerpiece is a prominent oval cabochon ruby, estimated at 8.00 to 10.00 carats. The stone exhibits a highly desirable 'pigeon-blood' red saturation. While visible inclusions are present—consistent with natural corundum—the translucency remains high for a stone of this magnitude. The trilliant-cut side diamonds (approx. 1.00 ctw) appear to have a color grade of G-H and clarity of VS, though their exact metrics are limited by the photographic perspective. The market for natural rubies of this size remains robust, particularly for those exhibiting such deep saturation. Comparable pieces recently sold at auction fall within the five-figure range, though the primary value driver is the origin and treatment of the ruby. Limitations and Authentication: As this is a visual inspection, I cannot definitively confirm if the ruby is of Burmese (Myanmar) origin or if it has undergone thermal enhancement or lead-glass filling, both of which drastically impact value. A physical inspection using a refractometer and a 10x jeweler’s loupe is required to verify the metal's hallmark and the stone's refractive index. Furthermore, a laboratory report from GIA or SSEF is strictly necessary to determine the presence of heat treatment and geographic origin. Should the stone be found to be unheated and of Burmese origin, the value would exceed this estimate significantly. Conversely, synthetic origin or heavy glass filling would reduce this value to a decorative range ($800–$1,500).