6.12 Ct. Topaz from Ceylon (Sri Lanka)

This 6.12 carat transparent blue topaz from Ceylon represents a rare combination of substantial weight, precise cutting, and vivid color intensity, offered by The Natural Gemstone Company. Measured at 11.15 x 10.99 x 7.07 mm, the stone exhibits a true trillion outline with evenly convex sides and gently rounded corners, a geometry that maximizes visual spread for its carat weight while preserving structural integrity. The cutter has executed a classic trillion faceting scheme that balances crown and pavilion angles to optimize return of blue spectral hues, with an emphasis on table facet proportions that enhance center light return and triangular star facets that produce a disciplined scintillation pattern. Clarity has been assessed as very slightly included when evaluated at eye level, indicating that microscopic, well oriented internal features do not interrupt the overall transparency or the uninterrupted play of light, and polish quality is rated as excellent, delivering crisp facet junctions and clean reflective planes across the crown and pavilion.

Weight is the defining attribute of this specimen, and the 6.12 carat mass materially elevates both aesthetic presence and market value. In faceted topaz, carat weight correlates directly with rarity of large, clear rough crystals suitable for precision cutting, particularly for colored material of vivid intensity. The 11.15 x 10.99 mm spread for this 6.12 carat trillion indicates an efficient cutting yield that preserves significant weight while producing an appealing table size and depth ratio, approximately 63 percent by measured proportions, a configuration that supports strong depth dependent light performance and avoids the washed out appearance that can affect overly shallow cuts. Larger carat weights also amplify color saturation in well cut stones, because the increased path length of light through the material intensifies perceived chroma, and in this example the vivid aqua blue demonstrates how weight and cut synergize to heighten color intensity. From a valuation perspective, prices for blue topaz do not increase linearly with carat weight, they step up, as cutters and dealers place a premium on stones that combine size with fine clarity and exacting cut, therefore a 6.12 carat trillion of vivid color and excellent finish occupies an elevated tier of demand relative to smaller sizes.

The piece has undergone controlled irradiation to develop and stabilize the vivid blue hue, a standard and widely accepted enhancement for topaz that, when properly executed and followed by appropriate annealing, produces durable color. Because the irradiation treatment is a known and permanent modification, the market values the resultant color on the basis of stability and visual quality, and collectors will recognize that this treatment allows access to intense blue tones that are otherwise rare in untreated material. The Sri Lankan origin contributes provenance value, as Ceylon rough is historically prized for its clean crystals and suitability for producing transparent, high clarity gemstones. Craftsmanship details include precise symmetry of the trillion outline, well matched facet sizes on opposing pavilion facets for uniform light return, and a crown pavilion relationship engineered to emphasize face up brilliance rather than excessive table dominance. The clarity grade very slightly included evaluated at eye level signals that the inclusions are minimal and non distracting, allowing the gem to be set in open designs that showcase its size and color, while the excellent polish enhances facet contrast and scintillation.

For setting and presentation, this 6.12 carat trillion is ideally suited to a range of design solutions that exploit its scale and triangular geometry, including three prong bezel or partial bezel settings that secure the corners while maintaining an open crown for maximum light entry, halo settings that magnify apparent size with well matched melee, and bespoke open gallery mounts that allow light to pass through the pavilion and maintain the stone weight as a central dealer attribute. From an investment and resale perspective, the combination of 6.12 carat weight, vivid color intensity, Sri Lankan origin, and top quality cut and polish positions this gem as a desirable specimen for both high end jewelry applications and collectors who prioritize large face up area and optical performance. For further technical data, high resolution images, and certification options, please contact The Natural Gemstone Company, our team will provide detailed facet maps, inclusion photomicrographs upon request, and advice on mounting strategies that preserve the stone weight and showcase its rarity and beauty.