1.30 Ct. Cabochon Chrysoberyl from Ceylon (Sri Lanka)

This specimen is a translucent greenish yellow chrysoberyl, round in overall outline, weighing 1.30 carats, with millimeter dimensions of 6.10 x 5.87 x 3.68, presented in a classic cabochon cut. The cutting style is a polished convex dome over a subtly flattened base, executed to emphasize uniform color distribution and light transmission rather than faceted brilliance. The laboratory classification records the color as greenish yellow, with a medium intense saturation that retains clarity of hue across the dome. Clarity is graded as very slightly included when evaluated at eye level, the polish is rated excellent, there is no enhancement reported, and the origin is Ceylon, now Sri Lanka. The stone is certified by Other, and the combination of weight, dimensions, origin, and untreated status positions this gem as a collector quality cabochon, offered by The Natural Gemstone Company.

From a gemological perspective chrysoberyl exhibits a refractive index range of approximately 1.746 to 1.755, with a low dispersion near 0.014 and a modest birefringence generally below 0.010. The mineral is orthorhombic and typically shows weak pleochroism in certain color orientations, so the cabochon orientation and dome profiling materially affect perceived hue and saturation. The 3.68 millimeter dome height relative to the 6.10 millimeter diameter produces a relatively high crown geometry, a configuration that increases the apparent color depth and promotes even light diffusion across the surface. The translucency of this piece yields internal light scatter that softens highlights and contributes to a satin like internal glow rather than windowing or strongly directional flashes. The combination of chrysoberyl hardness, approximately 8.5 on the Mohs scale, and the excellent polish ensures enduring surface integrity and a vitreous to slightly oily luster when set and worn.

The clarity assessment as very slightly included at eye level indicates inclusions that are observable under normal viewing, but do not materially disrupt the overall visual appeal. In Sri Lankan chrysoberyl one commonly encounters small pinpoint crystals, minute tube like growth structures, and fine veil like wisps that are oriented with the crystal architecture, and these features are consistent with natural growth and natural origin. These internal characteristics can be beneficial in distinguishing untreated material from glass filled or diffused goods, and in cabochon cutting they can impart a soft interplay of light that enhances perceived color complexity. The absence of enhancement is significant, as many gem buyers value the stable optical properties of untreated chrysoberyl, with no diffusion, heating, or dyeing applied. The cutter has executed the polish to an excellent standard, which for chrysoberyl requires progressive laps from coarse to fine grinding, finishing with submicron diamond or cerium based polishing agents to achieve a mirror like surface while preserving the dome geometry and minimizing surface chatter lines.

Practical considerations for setting and daily wear favor protective mounting styles, cords for the cabochon geometry, and metalwork that secures the perimeter with a close fitting bezel or partial bezel, preserving the dome profile while minimizing exposure to edge impacts. Given the stone size and shape, ring settings, pendant mounts, and bespoke collectors pieces are all appropriate, and the physical robustness of chrysoberyl makes it suitable for regular wear with standard care. The stone will perform best when the pavilion or base is supported by metal or a closed back seat to maintain stability and to allow the light interaction within the dome to read as a consistent greenish yellow field. For collectors and connoisseurs who assess provenance, the Ceylon origin contributes a known typology, with Sri Lankan chrysoberyl often noted for delicate and refined green yellow tones that differ from the deeper, more saturated stones from other localities.

This cabochon is presented with documented parameters that collectors and lapidaries will find useful, including the 1.30 carat weight, exact dimensions of 6.10 x 5.87 x 3.68 millimeters, the greenish yellow lab color classification, a clarity grade of very slightly included at eye level, excellent polish, and a declaration of no enhancements. The piece is ideal for buyers who prioritize natural origin, thoughtful lapidary execution, and durable gem material with distinctive color. The Natural Gemstone Company stands behind the description and certification provided, and offers provenance information on request to support connoisseur purchase decisions. For bespoke mounting guidance, matching metal recommendations, or detailed imaging to evaluate orientation and inclusion mapping prior to setting, The Natural Gemstone Company can provide further technical assistance and high resolution imagery on request.