4.70 Ct. Green Prasiolite from Brazil

This transparent green prasiolite presents as a finely proportioned round shape, weighing 4.70 carats, with precise dimensions of 10.44 x 10.59 x 7.67 mm. The gem is faceted with a mixed brilliant cut, a cutting style that balances table size and pavilion depth to maximize scintillation and light return. The stone displays an intense color intensity that is evenly distributed across the crown and pavilion, and the clarity grade is eye clean, evaluated at eye level, indicating an absence of visible inclusions to the unaided eye. The polish is excellent, yielding crisp facet junctions and a smooth surface that enhances the liveliness of the stone. Enhancement is by heat treatment, a standard and stable practice for prasiolite, and the origin of this specimen is Brazil. The Natural Gemstone Company presents this gem as a calibrated example of high quality prasiolite, suitable for fine jewelry applications and for collectors who value transparent, well finished quartz varieties.

The narrative of this gemstone begins millions of years ago within the complex geological environments of what is now Brazil, where tectonic activity and deep seated magmatism produced silica rich fluids that migrated through fractures and cavities in host rocks. Within these hydrothermal systems, supersaturated silica precipitated as quartz, crystallizing slowly under varying temperatures and pressures. Over geological time scales, elemental impurities and subtle changes in conditions produced variations in color and clarity. In some locales iron and trace elements, combined with natural radiation or localized heating events, contributed to the development of pale green hues in certain quartz crystals. The crystal that became this prasiolite experienced a prolonged period of growth, allowing for the formation of a coherent crystal lattice with minimal structural defects, which is reflected in the transparent, eye clean appearance seen today. Subsequent regional metamorphism and variable thermal histories altered some crystals further, and in modern times controlled heat treatment was applied to stabilize and intensify the green coloration, yielding the vivid tone that defines this piece. The story of this stone therefore spans deep time, from silica rich fluids and slow crystal growth, through tectonic reshaping, to contemporary gemological processes that refine and reveal the stone as a finished gem.

The cutting and finishing of this prasiolite convert its geological history into a wearable object of refined optical performance. The mixed brilliant cut is chosen to preserve weight while optimizing return of light through the crown, creating strong scintillation and a balanced face up appearance. The dimensions of 10.44 x 10.59 x 7.67 mm indicate a well proportioned girdle and pavilion depth that contribute to the overall balance of brilliance and color saturation. An eye clean clarity grade, confirmed at eye level, supports a clean window into the stone, allowing internal light paths to remain unobstructed and enabling the intense color to read clearly in varied lighting. The excellent polish produces sharp facet reflections, and the heat treatment applied to enhance color has been executed to industry standards to ensure stability and permanence of the green tone. For designers and jewelers this prasiolite offers dependable setting options, from classic solitaires to more intricate halo or multi stone compositions, and the round shape and mixed brilliant faceting simplify mounting choices while preserving optical appeal. The Natural Gemstone Company supplies this prasiolite with photographic documentation and measured specifications, reflecting a commitment to transparency and consistent quality. Proper care involves avoiding rapid thermal shock and prolonged exposure to harsh chemicals, ensuring that this gem retains its polished surface and vivid color for generations of use.