5.58 Ct. Bluish Green Prasiolite from Brazil

This oval bluish green prasiolite from Brazil weighs 5.58 carats and measures 13.53 x 11.20 x 6.61 millimeters, a proportion that yields a length to width ratio of approximately 1.21 and a calculated depth of roughly 53.5 percent, characteristics that indicate an elegant oval outline with balanced spread and good face up presence. The cutting style is fully faceted using a mixed brilliant schema, combining a brilliant cut crown with a pavilion optimized to return maximum light, creating scintillation across the table and precisely controlled contrast in the lower facets. The stone is transparent with an intense color intensity and an eye clean clarity grade evaluated at eye level, a combination that allows the mixed cut to play out with crisp facet junctions and lively internal reflections, and the excellent polish enhances overall light return and tactile smoothness on the girdle and pavilion facets. This piece has been heat treated to develop and stabilize its bluish green hue, a standard and well understood enhancement for prasiolite originating from Brazilian amethyst, and the heat treatment has been executed to preserve transparency while deepening tone and improving chroma without introducing surface-reaching alterations.

From a durability perspective this prasiolite performs well for daily wear when appropriate setting and care are applied, because prasiolite is a member of the quartz family with a Mohs hardness of seven, providing a good resistance to surface abrasion and scratching in comparison to many common materials encountered in everyday use. Quartz has no true cleavage planes, which greatly reduces the risk of splitting under lateral stress, and its fracture is conchoidal, meaning impacts are more likely to produce localized chips rather than propagating planar breaks, and the mixed brilliant proportions including a moderate depth percent and well executed pavilion geometry reduce the likelihood of vulnerable thin girdle areas or excessively shallow facets that can compromise edge strength. The excellent polish achieved by the cutter minimizes microabrasions that can become initiation sites for wear, and the consistent facet symmetry reduces stress concentrations under point loading, which translates directly to better performance in rings and other jewelry subject to repeated contact. Because the color has been generated and stabilized by controlled heating, the tone is resilient to ordinary light exposure and normal thermal variations encountered in daily life, while extreme or rapid temperature changes and exposure to aggressive chemicals should still be avoided.

For practical daily wear recommendations, The Natural Gemstone Company suggests mounting this prasiolite in protective settings that match its proportions and intended use, for example a low profile bezel for ring designs that fully embraces the girdle for maximal protection, or a four to six prong head with robust, rounded prongs that cover vulnerable girdle locations while allowing the crown to ventilate, which preserves brilliance and facilitates cleaning. Given the gem measures over 13 millimeters in length and displays strong face up color, a solitaire ring, pendant, or statement pair of earrings will showcase the intense bluish green while distributing mechanical stresses across a secure mounting. Cleaning is straightforward using warm water, mild detergent and a soft brush, rinsing and gentle drying with a lint free cloth, routine ultrasonic cleaning is generally safe for well finished, inclusion free quartz but should be avoided if the setting traps debris against facet junctions or if the gem is known to have internal fissures, and steam cleaning should be used with discretion because of potential localized thermal shock to the setting. The Natural Gemstone Company stands behind the gemological description and craftsmanship of this prasiolite, and our specialists are available to advise on bespoke setting options that protect the stone while maximizing optical performance and daily wearability.