145.74 Ct. Precious Topaz from Brazil

One exceptionally large and transparent peach precious topaz is presented at 145.74 carats, oval in outline, with finished dimensions of 37.70 x 27.20 x 17.40 mm. The hue registers as a delicate peach with medium color intensity, evenly distributed across the table and body of the stone, and the gem is noted as transparent, allowing deep pavilion reflections and clean table view. The clarity grade is eye clean when evaluated at normal viewing distance, and the surface condition is classified as excellent polish, which preserves sharp facet junctions and maximizes light transmission. Origin is Brazil, and the piece is offered with no enhancement, a critical attribute for collectors and connoisseurs who prioritize natural color and untreated provenance. The cutting style is a mixed brilliant, employing a brilliant facet scheme on the crown combined with step or modified step facets on the pavilion, a deliberate choice to marry scintillation with broad color presentation in a stone of this scale.

From a lapidary and gemological perspective, the mixed brilliant cut on this oval topaz has been executed to balance optical performance with weight retention, an important consideration given the original rough size. The crown displays a controlled table to crown ratio that permits a generous light window while preserving dispersion and flash from the brilliant facets. On the pavilion, facet planning adheres to a modified step arrangement that creates broad internal mirrors and layered reflections, working in concert with the crown to produce a lively play of light without sacrificing face up color saturation. Facet symmetry and alignment are of high standard, ensuring even reflection patterns and minimizing light leakage. The excellent polish enhances facet transparency and reveals the internal clarity, while the absence of treatment means that the color is inherent to the material rather than the result of irradiation or heating. For gem cutters and designers who assess topaz technically, the piece exhibits tight girdle continuity and balanced pavilion depth relative to the crown profile, attributes that simplify setting calculations and reduce the need for additional trimming during mounting.

The scale and optical character of this oval peach topaz make it unusually versatile for both casual and formal applications, a trait The Natural Gemstone Company highlights for clients seeking a single stone that transitions across contexts. For high wear everyday pieces such as a substantial pendant or a durable bezel set ring, the stone benefits from protective mounting that shields the girdle and tail while showcasing the table. For formal evening jewelry and museum quality commissions, open prong or halo designs will exploit the mixed cut to deliver intense scintillation under spotlighting, and custom multi stone compositions can use the oval elongation to create linear necklaces or cocktail rings that flatter the hand. Practical considerations for setting include the material hardness that resists surface abrasion and the distinct cleavage plane that calls for secure mounting and careful impact protection. Routine care is straightforward, recommending mild cleaning solutions and avoidance of ultrasonic treatments when the piece is seated in sensitive settings, and The Natural Gemstone Company can advise on bespoke mounting engineering that accounts for the dimensions 37.70 x 27.20 x 17.40 mm and the 145.74 carat weight to ensure longevity and optimal presentation. This topaz represents a mature balance of natural color, technical cutting excellence, and practical adaptability for a wide range of high end and daily wear designs.