8.39 Ct. Blue Topaz from Brazil

This transparent 8.39 carat blue topaz from Brazil is presented in a classic emerald cut, with precise dimensions of 12.11 x 10.04 x 7.28 mm, and a depth of approximately 65.7 percent, proportions that balance table size with pavilion depth to optimize both color saturation and step cut brilliance. The stone shows vivid color intensity and an excellent polish, characteristics that make it a striking centerpiece in any collection. The emerald cut produces broad, linear flashes that emphasize the blue topaz hue, delivering a refined, architectural shimmer rather than a scattering of small facet reflections. For an educated buyer assessing light performance and craftsmanship, the strong pavilion depth and well controlled girdle geometry on this gem translate into stable face up color and lively internal reflections when mounted, attributes sought after for both museum quality settings and high end wearable pieces.

From a gemological perspective this specimen is graded as very slightly included evaluated at eye level, a clarity assessment indicating only minor internal features that do not detract from the visual appeal at typical viewing distances. The transparency is excellent, and the very slightly included grade ensures that light transmission remains strong, supporting the vivid color intensity noted. As a natural topaz, it has a Mohs hardness of 8, a specific gravity around 3.53, and a refractive index in the range of 1.609 to 1.643, factors that contribute to its durability and sparkling appearance in jewelry. The piece has been enhanced by irradiation, a standard and widely accepted treatment to produce blue tones in topaz, and when followed by controlled heat treatment yields the deep blue seen here. Treated blue topaz is generally stable under normal wear and light exposure, however, avoidance of excessive heat and harsh chemicals will preserve its color fidelity over time.

At The Natural Gemstone Company we present this blue topaz with full disclosure of origin, enhancement, and measured parameters, to support informed acquisition decisions. The combination of 8.39 carats of vivid blue, an expertly executed emerald cut, very slightly included clarity at eye level, and Brazilian origin makes this gem both collectible and practical for fine jewelry commissions. Buyers seeking a centerpiece stone will appreciate the balance of size, optical performance, and value that this specimen delivers, and we welcome inquiries about certification, bespoke mounting recommendations, and viewing arrangements.