10.47 Ct. Yellowish Green Prasiolite from Brazil

This 10.47 carat, emerald cut shape yellowish green prasiolite is a study in precision cutting and material selection, offering dimensions of 12.30 x 11.00 x 10.83 mm, an intentional balance between face up presence and pavilion depth. The stone is fashioned as a classical emerald cut, characterized by broad step facets on the crown and pavilion, truncated corners to resist chipping in practical settings, and a relatively large table that emphasizes color saturation over scintillation. The cutter has oriented the step facets to work with the crystal habit of quartz, minimizing windowing and enhancing the even, intense color intensity that defines this gem. Clarity grade is very very slightly included, evaluated at eye level, signifying that inclusions are minimal and do not materially interrupt the clean, transparent appearance when set. The polish is described as excellent, yielding a glassy, high luster finish that complements the typical quartz refractive index near 1.54, delivering measured brilliance and crisp facet separation. Enhancement is by controlled heat treatment, a standard and stable process for converting certain amethyst varieties into prasiolite, and the piece is sourced from Brazil, a region with a long history of producing fine quartz material with consistent crystal size and color response to thermal enhancement.

In heritage terms this prasiolite aligns with centuries of preference for green gemstones in signet rings, devotional pendants, and talismanic jewelry, where rectangular step cuts were favored for their formal appearance and durability. Green stones have historically symbolized renewal and balance, and the emerald cut shape continues that lineage by providing a stable platform for bezel and prong settings used in heirloom pieces. For the discerning buyer and lapidary professional, this stone offers reliable parameters for design, including proportional dimensions suitable for a substantial ring mount or a statement pendant, and a facet architecture that accepts both bezel and stepped gallery work without compromising optical performance. The Natural Gemstone Company stands behind the documented origin and treatment history, and we can advise on setting approaches that protect the girdle and corners while showcasing the intense yellowish green tone. This prasiolite represents both a technically exacting cut and a continuation of classical gemstone traditions, ready to be incorporated into refined contemporary or historically inspired jewelry.