9.72 Ct. Bluish Green Prasiolite from Brazil

This prasiolite from Brazil presents as a finely proportioned, transparent, emerald cut gem weighing 9.72 carats, with exact dimensions of 15.64 by 11.39 by 7.75 millimeters, and a measured depth that equates to approximately 57.4 percent of the mean face dimensions. The faceting style is classical step cut, executed with a strong emphasis on parallel pavilion facets and a broad rectangular table to create a deliberate hall of mirrors effect. Color is described as bluish green with intense saturation and excellent uniformity across the table and crown facets, and the material has been heat treated to stabilize and intensify the hue, a standard enhancement for prasiolite. Clarity is graded as very very slightly included, evaluated at eye level, indicating only minimal internal features that do not interrupt the broad facet flashes, and the polish is excellent, yielding crisp facet junctions and lively surface reflection. Origin is Brazil, a source known for producing clean, large quartz crystals that allow cutters to retain substantial weight while still achieving precise proportions.

The cutting and finishing of this piece demonstrate deliberate technical decisions to maximize both presence and optical performance. The emerald cut proportions favor a slightly elongated profile, resulting in a length to width ratio that emphasizes the gem rather than overemphasizing spread, and the step faceting pattern has been arranged to produce parallel flash planes with minimal optical windowing. Girdle thickness and symmetry have been controlled to facilitate precision setting, and the pavilion steps converge with consistent facet angles to redirect light back through the crown, producing linear flash and depth rather than an overly faceted scintillation typical of brilliant cuts. The cutting approach preserves nearly ten carats of weight without sacrificing the clean step lines, a balance that is uncommon, because many cutters must sacrifice depth or retain irregular facets when working with heat treated prasiolite. The excellent polish enhances facet clarity and allows the intense bluish green color to read consistently under a range of lighting conditions, while the very very slightly included clarity at eye level confirms that internal features are both minor and strategically positioned to avoid compromising optic planes.

From a color grading and rarity perspective, this specimen is exceptional among prasiolite examples in both size and tone. Prasiolite of this weight in a pure, intense bluish green range is comparatively rare in the market, because large Brazilian quartz crystals suitable for green heat treatment are less frequently encountered, and because the heat treatment outcome can vary, often producing paler or uneven green tones. The intense color intensity of this stone positions it closer to colored gemstones that command attention in fine jewelry, rather than being treated as a minor accent gem. When compared to typical prasiolite parcels, which are often sub four carats or display weaker saturation, this 9.72 carat emerald cut piece stands out for its combination of size, saturation, and eye level clarity. For designers and collectors who prioritize technical attributes, the stone offers a stable color that will respond well to various mounting choices, particularly prong or low bezel settings that allow the crown to interact with ambient light and emphasize linear facet reflections.

The Natural Gemstone Company presents this prasiolite as a collector quality example for those who appreciate careful lapidary technique and uncommon material properties. The gem will serve well as a centerpiece in bespoke jewelry that demands both presence and refined optics, and it is especially suitable for clients who require a balance of weight retention and precise step cutting. Buyers seeking a large prasiolite with demonstrable craftsmanship and a rare, intense bluish green hue will find this specimen distinct from more common offerings, because it combines controlled proportions, excellent polish, and minimal eye level inclusions in a nearly ten carat size class derived from Brazil.