4.77 Ct. Topaz from Ceylon (Sri Lanka)

One beautiful transparent 4.77 carat oval blue topaz is presented with precise dimensions of 11.81 by 9.82 by 5.81 millimeters, cut in a mixed brilliant configuration that maximizes optical return. The mixed brilliant geometry combines a faceted crown composed of well proportioned star and kite facets with a pavilion that integrates both brilliant style facets and shallow step elements. This hybrid arrangement is engineered to work with blue topaz physics, taking into account a refractive index centered around 1.62, to optimize the number of internal reflections and facet-to-facet light transfer. The table has been proportioned to balance contrast and flash, yielding a vibrant pattern of scintillation under point and diffuse light, while the pavilion angles have been carefully calibrated to produce strong facet flashes rather than excessive windowing or dead areas. Symmetry is consistent across the oval outline, and the girdle has been executed at a thin to medium thickness to enable secure setting without excessively interrupting the light path.

Color grading of this stone reads as medium intense, with a clean sky to Swiss blue hue that is uniform across the table and crown planes. The medium intensity allows excellent saturation without veiling, so that facet reflections carry vivid blue tones into the observer field while still exhibiting internal depth. Irradiation enhancement has been applied to stabilize and intensify the blue chroma, a standard and stable treatment for topaz that yields even color distribution when performed and annealed to industry norms. Due to its crystal orientation and modest pleochroism, this topaz displays consistent color from most viewing angles, and the mixed brilliant faceting further homogenizes color by dispersing light across the crown facets. For buyers sensitive to treatment disclosure, the enhancement is noted, and the origin is Ceylon Sri Lanka, a source known for producing clean, well crystallized topaz material suitable for precision cutting.

Clarity assessment is very very slightly included at eye level, a grade that indicates only minor natural internal features visible to a trained viewer under standard light, and none that interfere significantly with brilliance or structural integrity. The cutter has placed these minor inclusions away from primary facet junctions where possible, using the stone orientation to hide or minimize their visual impact. The excellent polish on every facet plane ensures that light transmission is not impeded by surface abrasion, and facet edges have been executed with crisp junctions to enhance scintillation. Because topaz exhibits low dispersion and limited fire compared with gem species of higher refractive indices, the success of this piece in generating lively optical performance rests on geometric precision rather than on spectral fire, and the mixed brilliant arrangement in this oval has been optimized to transform the intrinsic reflective properties of the material into pronounced flash and return.

From a practical and design perspective, the oval outline and mixed brilliant geometry make this stone highly adaptable to multiple settings while preserving maximum light play. The slightly elongated oval silhouette increases the apparent face up size, and the faceting pattern yields a central starburst of light that reads well in bezel or prong settings where the pavilion remains exposed to allow light entry and exit. For designers considering complementary stones, pairing this blue topaz with White Opal accent stones can create a refined contrast between the topaz clear blue and the opal body tone, the latter providing soft diffuse opalescence that highlights the topaz clarity and crisp facet reflections. Jewelers are advised to select mounting styles that do not obstruct the pavilion or create excessive metal shadowing beneath the stone, thereby preserving the engineered light performance that is central to the cutter intention.

This gem is offered by The Natural Gemstone Company with documentation of its physical parameters and treatment history. The combination of a 4.77 carat weight, exact millimeter dimensions, mixed brilliant faceting, medium intense color, very very slightly included clarity at eye level, irradiation enhancement, excellent polish, and Ceylon Sri Lanka provenance delivers a technically refined topaz specimen for collectors and fine jewelry makers who demand controlled optical behavior and precise cutting standards. The cutter intent is evident in the geometry, and the result is a transparent oval topaz that maximizes internal reflection and scintillation while maintaining stable color and practical durability for everyday wear.