6.70 Ct. Bluish Green Prasiolite from Brazil

This exceptional 6.70 carat round bluish green prasiolite from Brazil measures 12.78 millimeters by 12.35 millimeters by 7.74 millimeters, a substantial size for a transparent prasiolite that displays both presence and refined optical performance. Cut in a faceted mixed brilliant style, the piece combines a brilliant crown geometry with a carefully calibrated pavilion architecture, yielding an energetic play of light while preserving rich, even saturation of the bluish green hue. The color intensity reads as intense throughout the body of the stone, with uniform distribution and minimal zoning, and the irradiated enhancement applied under controlled laboratory conditions has given the gem its vivid tone while preserving natural clarity and structural integrity. The excellent polish accentuates facet crispness and mirror like facet junctions, which is essential for optimal light entry and exit, and ensures that the surface finish contributes no competing softening or diffusion of sparkle.

From a gemological and lapidary perspective this prasiolite exhibits qualities that make its visual performance exceptional from every angle. The clarity grade is recorded as very very slightly included evaluated at eye level, effectively presenting as clean to the unaided observer, with inclusions confined to microscopic planes that do not interrupt light pathways. The mixed brilliant cut leverages a precise crown diameter and a pavilion depth that balances return of white light and selective dispersion, with a total depth of approximately 61.6 percent which sits within an optimal range for round cuts that aim to maximize brightness without sacrificing color saturation. Symmetry across the facet pattern is meticulous, facet junctions are tight, and the girdle is proportioned to protect against chipping while allowing secure bezel or prong settings. These technical choices create a dynamic contrast pattern, lively scintillation, and a controlled aperture for fire, producing a gem that remains visually engaging under both direct and diffused lighting.

The finishing and enhancement history further elevate the stone as a refined choice for collectors and high end jewelers. The irradiation process used to develop the bluish green character is a stable enhancement when followed by appropriate post treatment protocols, and coupled with the excellent polish and superior faceting, the result is a gem that maintains its chromatic integrity under typical wear conditions and standard jewelers handling. The prasiolite displays crisp facet reflections and a clean window through its table, enabling viewers to appreciate the depth of color as light penetrates and reflects from the pavilion planes, while the subtle dispersion contributes to a whisper of spectral flashes that enliven the dominant bluish green. At The Natural Gemstone Company we document origin and treatments, and we can provide additional imaging and viewing under multiple light sources to demonstrate how the stone presents under daylight, incandescent, and mixed lighting, showing consistent color intensity and exceptional brilliance.

For connoisseurs who evaluate gems by both technical merit and aesthetic outcome this prasiolite represents an intelligent selection, combining a substantial carat weight, disciplined lapidary execution, and a clarity that is effectively flawless to the unaided eye. Its round mixed brilliant architecture affords designers flexibility to set it as a solitaire, halo, or multi stone composition, where its intense bluish green tone will harmonize with both warm and cool metal choices. The Natural Gemstone Company stands behind the stone with detailed provenance and craftsmanship notes, and we are available to discuss setting recommendations, provide additional gemological data, and arrange private inspection. This prasiolite rewards close study, and its flawless presentation and technical refinement ensure that it captivates from every viewpoint, maintaining an elegant balance between optical performance and deep, saturated color.