10.45 Ct. Bluish Green Prasiolite from Brazil

This specimen is a transparent bluish green prasiolite weighing 10.45 carat, presented in an elegant oval outline with dimensions of 15.28 x 12.49 x 9.57 mm, sourced from Brazil and offered by The Natural Gemstone Company. The hue reads distinctly bluish green with an intense color intensity that is evenly distributed across the table and pavilion, producing a saturated yet fresh appearance. Transparent and clean to the unaided eye, the stone displays a lively tone that benefits from both its natural quartz base and the controlled enhancement it received. The overall visual impression is one of clarity and depth, suitable for a focal gem in high end jewelry, while retaining the mineralogical integrity of natural quartz.

The cutting style is faceted, executed as a mixed brilliant interpretation that pairs a brilliant facet pattern on the crown with a calibrated step arrangement on the pavilion. This mixed approach is chosen to marry scintillation and color saturation, with the brilliant crown returning dynamic white light and the step pavilion reinforcing color depth through controlled light leakage. Proportions are deliberate, the length to width ratio at approximately 1.22 giving a slightly broad oval silhouette that sits well in both bezel and prong settings, and the depth measures approximately 69 percent relative to the average of length and width, a proportion that optimizes internal reflection for this material. Polish is excellent, the facet junctions are crisp, and symmetry is precise, indicating careful preform orientation and finishing. Girdle presentation is even and suited to secure mounting, and the facet geometry was planned to maximize both brilliance and the inherent bluish green saturation.

Clarity is graded as very very slightly included when evaluated at eye level, the inclusions being minute and generally confined to the lower pavilion where they do not interrupt the visual plane, thus preserving full transparency and sparkle. As a quartz mineral, prasiolite displays a refractive index range around 1.544 to 1.553, a birefringence of approximately 0.009, and a specific gravity near 2.65, all of which contribute to predictable cutting responses and durability for everyday wear, with a Mohs hardness of 7. The present stone has been enhanced by irradiation, a controlled treatment frequently applied to Brazilian quartz to convert violet amethyst to stable green tones, and in this case it yields a bluish green that reads intense and consistent. The irradiated color is stable under normal daylight and indoor conditions, and the combination of treatment and cut produces a gem that balances optical performance and color integrity. The excellent polish and facet alignment minimize any scattering from inclusions, and the overall result is a gem that will display lively scintillation without compromise.

This prasiolite links directly to the long tradition of green gemstones used as symbols of renewal and heart centered energy, standing in the lineage of lessees who prized emerald, peridot, and jade for similar associations in different cultures. In European lapidary history, green quartz variants found favor in Victorian jewelry where color and affordability made them popular choices for cameos and dress pieces, and in Brazil the cutting of green quartz has been refined over generations to produce stones that combine visual appeal with gemological consistency. The current piece is well suited to classic solitaire rings, pendant drops that allow for depth of color viewing, or bespoke signet and statement pieces where a balanced oval can harmonize with metalwork. At The Natural Gemstone Company we document provenance and treatment, and we work with clients to advise on mounting orientation and protective settings to preserve the irradiated color and surface polish. This prasiolite is an opportunity to acquire a sizable, technically well executed gem with a clear link to both the geological and cultural heritage of green stones, ready to be integrated into fine jewellery that honors its material history.