40.24 Ct. Swiss Blue Topaz from Brazil

One transparent Swiss blue topaz, 40.24 carats, oval shape, dimensions 23.50 by 18.90 by 12.70 millimeters, hand finished with a mixed brilliant cut that combines a brilliant style crown with a modified pavilion geometry to balance scintillation and face up color. The cutter has optimized facet junctions and angles to the refractive index range typical for topaz, producing strong return and lively dispersion without excessive windowing, and the measured depth is approximately 59.8 percent based on averaged length and width. Clarity is graded eye clean at normal viewing distance, which means there are no inclusions visible to the unaided eye, and the excellent polish ensures crisp facet reflections and minimal surface disturbance. Color is described as vivid Swiss blue, evenly saturated across the table and pavilion planes, and the hue and tone are stable as a result of controlled irradiation enhancement. Origin is Brazil, and this specimen reflects regional rough characteristics in crystal habit and color response after treatment. The Natural Gemstone Company presents this stone with full disclosure of enhancement, and the cutting and finishing clearly prioritize optical performance while preserving weight and structural integrity.

While the stone is eye clean, microscopic inclusions are nevertheless present in many natural topaz crystals, and these features function as unique identifiers that add provenance and character without degrading the gem visually. Typical internal features in Brazilian topaz include minute trapped mineral crystals, healed fissures, and very fine fluid trails, and when viewed under magnification these act as a fingerprint that links the specimen to its geological history and cutting sequence. Such inclusion suites are useful for documentation and certification, and they assist in distinguishing natural material from synthetics or assembled stones, particularly when combined with known treatment records such as irradiation. From a technical standpoint, the inclusion population in this piece is sparse and well distributed, which preserves optical continuity and contributes to the strong, vivid face up color. For the knowledgeable buyer, this topaz offers measurable specifications, transparent treatment disclosure, and traceable internal characteristics, making it an excellent candidate for high quality jewelry settings or for collectors seeking well documented, investment grade colored gemstones.