18.65 Ct. Brown Cabochon Smoky Quartz from Brazil

This listing describes one translucent, pear shape brown smoky quartz offered by The Natural Gemstone Company, presented as a cabochon. The specimen weighs 18.65 carats, equivalent to approximately 3.73 grams, and measures 22.35 x 16.16 x 8.13 millimeters. The color is an intense brown with a level of translucency that permits soft light penetration while retaining a warm, saturated appearance across the table and side facets of the dome. The origin is Brazil, and the stone is natural with no enhancement recorded, a specification that confirms the color and clarity are intrinsic rather than treated.

The cutting style is a classic cabochon, executed in a pear outline with well-defined symmetry. The domed top displays a smooth, continuous curvature that transitions cleanly to a well-formed girdle and a proportioned pavilion, attributes that contribute to comfortable setting and balanced visual weight. Polish quality has been assessed as excellent, producing a high degree of surface luster that accentuates the stone’s internal color depth and clean appearance. Clarity is graded as eye clean at normal viewing distance, indicating the absence of inclusions visible to the unaided eye and assuring an unencumbered visual field that emphasizes color and form rather than internal features.

From a material and practical perspective, smoky quartz is a durable variety of quartz with a Mohs hardness of approximately 7, a refractive index in the range 1.544 to 1.553, a specific gravity near 2.65, and a vitreous luster when polished. These characteristics make it suitable for a wide range of jewelry applications including pendants, drop earrings, and rings, provided appropriate setting design is used to protect the cabochon’s domed surface. The substantial dimensions and carat weight of this piece make it particularly well suited for statement pendants or designer rings where a pronounced, elegant brown tone is desired. The cabochon style also lends itself to bezel settings and secure mounts that minimize exposure of the dome to surface wear.

Care and handling recommendations are conservative and industry standard. Clean the gemstone with mild detergent, warm water, and a soft brush, and avoid exposure to strong acids, prolonged high heat, or extreme mechanical shock. Ultrasonic cleaning is generally acceptable for sound quartz, but should be avoided if a stone displays significant internal fractures or if its mounting could trap fluids or air bubbles; when in doubt, opt for gentle hand cleaning. For design and setting decisions, note the stone’s thickness of 8.13 millimeters provides depth for secure bezel construction, while the 22.35 by 16.16 millimeter footprint is compatible with classic pear-shaped settings and contemporary minimal mounts alike. The Natural Gemstone Company stands behind the natural origin and unenhanced status of this smoky quartz and can provide additional photographs, exacting measurements, or assistance with bespoke setting plans upon request.