11.13 Ct. Yellowish Green Prasiolite from Brazil

This 11.13 carat transparent princess shape prasiolite from Brazil is a finely proportioned example of careful lapidary work, measuring 12.74 x 11.51 x 10.08 mm. The gem presents a yellowish green bodycolor with intense color saturation, combined with an eye clean clarity grade evaluated at eye level, and an excellent polish that renders the facet junctions crisp and reflective. The stone has been heat treated, a standard and stable enhancement for prasiolite that produces the desirable green hue from pale or brownish quartz material, and this treatment has been executed to preserve optimal transparency and minimize internal color zoning. The princess cut was selected to balance weight retention with optical performance, yielding a square outline with true corners, a broad table and a pavilion and crown architecture that emphasizes both depth and surface brilliance, qualities that The Natural Gemstone Company values in gemstones intended for prominent settings.

The cutting and faceting strategy on this prasiolite leverages the princess cut geometry to generate strong internal reflections and a controlled scintillation pattern. The crown facets are arranged to form a broad, open table window that showcases the stone bodycolor, while the pavilion facet layout has been tailored to return light efficiently through the crown, producing layered, almost architectural reflections that accentuate the square form. The excellent polish heightens surface luster, promoting mirrorlike glints on facet faces and crisp light return in the pavilion. Because quartz has modest dispersion compared with high dispersion gem materials, the visual interest here comes from contrast and well executed facet planes rather than fire, and the cutter intentionally prioritized pavilion depth and facet symmetry to avoid windowing, to retain color saturation and to create an internal step like pattern that is visible when viewing the stone face up. The result is a gem that reads as technically precise, with even facet proportions and consistent refraction across the table, factors that support a premium appearance in both solitaire and multi stone designs.

Under different lighting conditions the optical personality of this prasiolite shifts in predictable and desirable ways, giving the wearer flexibility. In natural daylight, especially under northern sky or overcast conditions where the spectrum is balanced, the intense yellowish green appears fresh and evenly saturated, with the step like internal reflections producing soft rectangular flashes that follow movement. Under cool white LED light the green component tends to be emphasized, yielding a crisper, slightly greener presentation and enhancing the gem’s apparent contrast, because the sharp facet junctions turn specular highlights into lively scintillation. Under warm incandescent or candlelight the stone leans toward its yellow facet, appearing warmer and more luminous, the color reading as a richer chartreuse, while overall brilliance is slightly softened but the bodycolor deepens and takes on a more gemlike glow. Under focused spot lighting or a jeweler’s spotlight the princess cut delivers dramatic pinpoint flashes and pronounced internal reflections that break into layered squares and parallelograms, creating a strong visual structure that emphasizes the precision of the cut. In diffuse indoor illumination the transparency and excellent polish allow the color to sit evenly across the table, making the stone an elegant choice for designs where a steady, saturated color is desired. For mounting I recommend settings that allow light access to the pavilion, such as four prongs or an open gallery mount, to preserve the dynamic light performance The Natural Gemstone Company has engineered into this 11.13 carat prasiolite, ensuring its technical attributes translate to striking visual impact on the hand.