9.21 Ct. Yellowish Green Prasiolite from Madagascar

This parcel contains one transparent prasiolite weighing 9.21 carat, presented in a classical oval outline with finished dimensions of 14.80 by 11.15 by 8.66 millimeters. The bodycolor reads as a yellowish green with medium color intensity and even saturation across the table and keels, lending the gem a lively, consonant tone under both daylight and warm incandescent sources. Clarity is graded as very slightly included evaluated at eye level, with minute feathering and a few pinpoint crystals confined primarily to the pavilion that do not materially interrupt the table or face up transparency. The cutting style is a mixed brilliant, executed to balance scintillation with broad flashes, and the polish has been assessed as excellent, yielding crisp facet junctions and a clean, reflective finish. This prasiolite originates from Madagascar and has undergone standard heat treatment to develop and stabilize the green hue, a stable enhancement commonly used for this variety of quartz. The Natural Gemstone Company presents this stone as a single high quality specimen suited to fine jewelry applications where optical performance and wearable size are both priorities.

The mixed brilliant faceting on this oval is designed to combine the lively light return of a brilliant crown with the depth and window control of a step influenced pavilion. The crown features a moderately sized table that allows for a balanced interplay between large flashes and micro scintillation, while the crown angle and bezel facets have been tuned to reduce extinction in the lengthwise axis typical of oval forms. The pavilion has been faceted to a depth that preserves weight while optimizing internal reflection, which is particularly important for prasiolite whose refractive index is just above quartz norm, yielding strong but not overly aggressive brilliance. Facet symmetry is precise, with well aligned culet and girdle planes that facilitate accurate setting without extra reworking by the bench. The girdle is faceted and of medium thickness, suitable for both prong seats and bezel channels, and the excellent polish enhances both face up clarity and the stone color, enabling confident use in open back and closed back mounting designs.

For customization into jewelry settings this 14.80 by 11.15 by 8.66 millimeter oval is exceptionally versatile, lending itself to rings, pendants, earrings, and bracelet centers. In ring design the stone adapts well to a four or six prong crown for maximum light entry and classic presentation, or a full bezel for added protection and a contemporary aesthetic, with the medium girdle providing secure seat geometry for either option. The depth and pavilion profile support an east west orientation for modern signet styles as well as the conventional north south placement for engagement and cocktail rings. The oval dimensions are ideal for halo designs, where a fine row of melee diamonds or colored accents can increase perceived size and emphasize the central hue, or for three stone compositions where tapered baguettes or pear shaped side stones complement the length of the oval. For pendants a low profile three prong setting will allow forward light to enhance the medium color intensity, whereas a closed back mount can intensify color for collector oriented pieces. Matching pairs of smaller complementary prasiolites can be faceted to serve as earring mates, and the gem will also respond well to mixed metal approaches, for example warm yellow gold to emphasize the yellowish notes, or white metals to present a cleaner, more contemporary green.

From a practical and provenance perspective this prasiolite is an excellent choice for custom work executed by experienced jewelers and designers. The heat treatment performed is stable under normal wear and standard jewelry repair temperatures, however extreme thermal shock should be avoided, and routine ultrasonic cleaning should be used with caution due to the presence of some very slight inclusions. The prasiolite family sits at a Mohs hardness of 7, providing good wearability for rings and bracelets while still benefiting from protective design considerations when used in everyday pieces. The Natural Gemstone Company is prepared to offer bespoke mounting services, advice on complementary accent stones and metal choices, and measurements for setting templates to minimize reworking at the jeweler. We can also supply additional imagery under controlled lighting and optional gemological documentation upon request. For clients commissioning an engagement or heirloom piece we recommend discussing bezel edge profiles and prong bearing points to preserve the oval outline and to secure the stone without undermount stress. With its balanced color, refined mixed brilliant faceting, and substantial 9.21 carat presence, this Madagascan prasiolite is well suited to become a centerpiece in a tailored jewelry design that prioritizes optical performance and longevity.