9.34 Ct. Green Cabochon Chalcedony from Brazil

This specimen is a 9.34 carat green chalcedony, oval shape, with precise dimensions of 16.27 x 11.34 x 6.30 mm, presented as a traditional cabochon. As chalcedony, the material is a cryptocrystalline variety of quartz, exhibiting the characteristic compact structure that yields an even, opaque body tone. The color registers as a vivid, deep green with high saturation and medium dark tone, producing strong visual presence without windowing or pale areas. The cabochon cutting style enhances the uniformity of color, and the high dome preserves optical depth when viewed face up or at an oblique angle. The gem displays an excellent pol ish that approaches a bright, waxy to slightly vitreous luster, and the surface is free from lap lines or cutter abrasions, confirming exacting lapidary technique.

From a craftsmanship perspective, the stone exemplifies considered proportioning for cabochon fashion. The dome height at 6.30 mm relative to the 16.27 by 11.34 mm outline indicates a full, rounded profile chosen to maximize perceived saturation and depth. The oval outline has been executed with tight symmetry and a well controlled girdle circumference that will facilitate precise bezel settings. The cutter has oriented the fiber structure and any subtle banding to present an even face, minimizing risk of shadowing or localized translucency. The polish finish has been achieved using progressively finer abrasives and final lap polishing agents, resulting in mirror like reflectivity across the dome that emphasizes the stone s internal color rather than surface texture.

This chalcedony has been dye treated, a common and accepted enhancement method for this material, applied to intensify and stabilize the green hue. The dyeing process for chalcedony typically involves controlled immersion and heat or pressure protocols to allow dye penetration into micro fissures and intergranular voids. This treatment produces a consistent color that responds predictably to lighting and mounting. Buyers should note that while dye treatments are generally stable under normal wear, exposure to aggressive solvents, prolonged UV bleaching, or steam cleaning can affect the appearance over time. Clean the stone with mild detergent and warm water, using a soft cloth and avoiding ultrasonic baths and steam. Set the gem with protective mounting practices, such as a bezel or partial bezel, to reduce direct impact and chemical exposure, and consider periodic inspection to confirm color stability if the piece is subject to frequent cleaning.

As a curated addition to a high end gemstone collection, this piece combines material quality with deliberate lapidary choices, making it well suited for bespoke jewelry or as a museum quality cabinet specimen. The intense, even green and generous cabochon dome make the stone particularly attractive for gold or silver bezels where the metal plane supports the underside and frames the dome, or for custom signet or cocktail ring designs where the visual mass benefits from a thicker bezel seat. Origin stated as Brazil provides a traceable provenance to a region known for producing high quality chalcedony material. The Natural Gemstone Company stands behind the description and offers transparent disclosure of the dye enhancement, along with optional supporting documentation on request. For collectors and jewelers seeking a stable, vividly colored chalcedony with refined cutting and polish, this 9.34 carat oval cabochon represents a technically superb and immediately wearable acquisition.