1.64 Ct. Kyanite from Nepal

This specimen from The Natural Gemstone Company is a transparent 1.64 carat oval blue kyanite, with precise dimensions of 8.13 x 6.05 x 4.12 mm, presented in a mixed brilliant cut, with a clarity grade of slightly included at eye level, a medium intense color intensity, an excellent polish, no enhancement, and an origin of Nepal. The oval outline has been proportioned to industry standards to preserve weight while optimizing the optical path length that governs color saturation in kyanite. The stated clarity indicates minor internal features that are observable at normal viewing distance but do not materially interrupt the overall transparency or the continuity of faceted reflections. The medium intense blue is evenly distributed across the table and crown facets, offering a balanced hue that benefits from the mixed brilliant faceting strategy chosen by the cutter. The excellent polish ensures that facet junctions act as efficient mirrors for incident light, increasing contrast and directional return across viewing angles.

The mixed brilliant execution on this oval is a deliberate synthesis of brilliant style crown geometry and a modified pavilion schema tailored to kyanite’s anisotropic optical behavior. The crown presents a well proportioned table to crown height ratio, with crown facets cut to reflect light into the pavilion and back through the table, maximizing face up brilliance without sacrificing color. The pavilion has been faceted with a controlled depth and a series of angled facets that create multiple internal reflection planes, effectively converting dispersed light into concentrated flashes. Facet symmetry has been maintained within tight tolerances to promote consistent scintillation patterns during movement. The girdle is even, offering predictable setting performance and limiting light leakage around the stone perimeter. Attention to facet junction sharpness and pavilion symmetry underlies the excellent polish assessment, and the cutter’s decisions reflect an intention to balance light return, dispersion, and the enhancement of the stone’s native blue tone.

From an optical performance standpoint, the cut amplifies kyanite’s inherent properties by managing the gemstone’s light paths and by mitigating typical pleochroic behavior through orientation and facet placement. Kyanite commonly exhibits directional color variation due to anisotropic crystal structure, and the mixed brilliant approach here aligns the table plane with the axis that yields the most desirable blue, while the pavilion facets redistribute light to maintain even saturation. The crown to pavilion ratio has been calibrated to increase internal reflections and to produce a controlled flash of lighter and deeper blue as the gem moves, creating depth and visual complexity. The excellent polish minimizes micro diffusion at facet surfaces, preserving specular reflection and delivering crisp facet contrast, which enhances perceived clarity despite the slightly included grade. The result is a balance between brilliance and color retention, the former driven by the brilliant style facets that scatter and return light, and the latter preserved by the pavilion proportions that avoid over thinness which would otherwise mute the medium intense blue.

For practical application in jewelry, this 8.13 x 6.05 x 4.12 mm oval is suitable for a variety of settings where light access and orientation can be controlled, such as open backed prong mounts or bezel designs with a light aperture, ensuring the mixed brilliant facets perform optimally. Ring and pendant designs that allow movement will reveal the engineered scintillation and the controlled pleochroic shifts that make kyanite visually engaging. The slightly included clarity grade suggests routine setting care to minimize abrasion at facet interruptions, and the absence of enhancement confirms the stone’s natural state, an attribute important to collectors and connoisseurs who value untreated provenance. Sourced from Nepal and finished to an excellent polish, this blue kyanite exemplifies The Natural Gemstone Company’s emphasis on technical cutting strategies that respect the material’s crystal properties, yielding a gem that combines precise craftsmanship with robust optical performance.