5.88 Ct. Bluish Green Prasiolite from Brazil

Presenting a beautiful transparent prasiolite from Brazil, a 5.88 carat oval measuring 12.74 x 10.86 x 7.47 millimeters, cut and finished to exacting standards by experienced lapidaries at The Natural Gemstone Company. The gem is fashioned in an elegant oval outline with a length to width ratio of 1.17 and a total depth that measures 63.3 percent of the average of the length and width, proportions selected to balance color saturation and light performance. The cutting style is faceted with a mixed brilliant approach, delivering the scintillation expected from a brilliant crown for lively sparkle and a controlled pavilion geometry that deepens the bluish green body color. The prasiolite has an intense color intensity, an eye clean clarity grade when evaluated at eye level, an excellent polish, and is identified as irradiated, a stable enhancement commonly used to produce the green hue in prasiolite sourced from Brazil.

The mixed brilliant faceting strategy employed on this oval prasiolite is executed to match the optical character of quartz. The crown is arranged with precise brilliant style facets to disperse light and create dynamic scintillation, while the pavilion uses modified step and well proportioned facets to enhance depth of color and preserve saturation through the stone center. Facet junctions are sharp, symmetry is controlled to minimize light leakage, and the overall facet geometry is tuned to the refractive index of quartz, which for prasiolite lies approximately between 1.544 and 1.553. Because quartz exhibits modest dispersion and weak birefringence, the cutter optimized crown angles and pavilion slope to favor controlled contrast and color rather than chasing fire. The table and crown proportions are chosen to maximize perceived brightness at face up view while retaining enough pavilion depth to concentrate the bluish green tone in the stone heart, an approach that yields a visually balanced and wearable gem that photographs reliably and performs well under varied lighting.

The color in this piece is a resolute bluish green with intense saturation and an even distribution across the oval outline. Under standard viewing conditions the hue reads predominantly green with a definite blue component that gives the gem a cool, refined presentation, and because of the intense saturation the stone maintains presence in both daylight and artificial illumination. The prasiolite has been treated by irradiation, a documented enhancement for quartz that produces stable green tones when followed by appropriate heat treatment protocols. This enhancement is mature technology in the trade, and the resulting color is considered stable for routine wear and display. As with all color treated gems, the usual precautions apply, avoid exposing the stone to prolonged extremes of heat or to highly concentrated light sources for extended periods, and do not subject the mounting to aggressive laboratory heating without consulting a qualified gemological laboratory. The Brazilian origin is consistent with the material chemistry and inclusion suite observed, and the piece represents a clean, saturated example of market grade prasiolite suitable for fine jewelry or a focused collection.

Inclusions in this prasiolite are minimal at the eye level, consistent with the eye clean clarity assessment, yet they provide a microscopic fingerprint that contributes to the gem character and forensic identity. Under moderate magnification you may observe very fine needlelike mineral inclusions and occasional two phase fluid inclusions, along with subtle growth zoning and healed feather type features that do not disturb the surface polish. These internal features are commonly encountered in natural quartz family material and they act as diagnostic identifiers for origin and treatment history when viewed by a trained hand lens or microscope. Rather than detracting from value, these features authenticate the natural crystal habit and cutting provenance, and they create internal texture that interacts with facet junctions to yield slight internal contrast patterns desirable in collector circles. The excellent polish and careful facet alignment ensure that these inclusions do not interfere with surface brightness or tactile finish, leaving an overall presentation that is both gemologically interesting and visually appealing.

This 5.88 carat bluish green prasiolite from Brazil is a refined option for a custom engagement ring center, an elegant pendant, or a collector seeking a high quality irradiated prasiolite with strong color identity and technical cutting merit. The length and width dimensions afford good presence on finger and neckline settings while the 63.3 percent depth provides structural integrity and color depth, and the mixed brilliant faceting offers a balance of sparkle and chroma. For buyers who value technical detail, this stone offers measurable proportions, documented enhancement, and an inclusion suite that serves as a unique identifier for future verification. The Natural Gemstone Company stands behind the craftsmanship, and we can provide additional high resolution imagery, light table images, and loop level reports on request to support setting decisions or certification. Contact our gem specialists for consultation on settings, mounting recommendations, or to arrange a viewing appointment, we are available to assist with any technical or aesthetic queries you may have.