1.68 Ct. Cabochon Alexandrite from Ceylon (Sri Lanka)

This listing describes a natural alexandrite from Ceylon Sri Lanka, offered by The Natural Gemstone Company, certified by Other. The specimen is a 1.68 carat round cabochon with semi translucent body and a classic domed profile, presenting dimensions of 6.66 by 6.40 by 4.20 millimeters. The lab color classification is Color change, reflecting a genuine shift in apparent hue under different lighting conditions. The piece is unenhanced, with no treatments reported, and the overall finish is reported as excellent, with a highly polished surface that complements the cabochon form.

The most notable attribute of this alexandrite is the pronounced color change, observed as a bluish green tone in daylight or cool light sources, transitioning to a reddish purple appearance under incandescent or warm illumination. Color intensity is described as vivid in both lighting environments, and the cabochon cut accentuates the phenomenon by presenting a uniform field of color and allowing the viewer to appreciate the shift without facet distraction. This behavioral contrast is characteristic of alexandrite and is driven by the mineral chromophore composition, with chromium typically playing a dominant role in the absorption features that produce the color change. The semi translucent nature of this stone moderates the depth of color, yielding a strong visual response while maintaining internal depth and glow.

Clarity is graded as very very slightly included at eye level, indicating that inclusions are minimal and not readily apparent to the unaided eye when examined face up. These minor internal features do not detract from the overall appearance, and they can provide useful confirmation of natural origin when observed under magnification. The cabochon was shaped to a round outline with careful attention to symmetry and dome height, and the excellent polish creates a smooth reflective plane that enhances strong light return and color saturation. Because this alexandrite has not been subjected to heating or other common enhancements, it retains natural material integrity, which is often a determining factor in valuation alongside color change strength, origin, and carat weight.

Presented with certification by Other, this 1.68 carat Ceylon alexandrite cabochon represents a natural, unenhanced example of a color change gem with vivid hues and high polish. Its proportions and semi translucent clarity make it well suited to traditional cabochon settings such as solitaire rings pendants and bespoke fine jewelry pieces where the color change can be appreciated in multiple lighting situations. For routine care gentle cleaning with warm soapy water and a soft brush is recommended, avoiding prolonged exposure to harsh chemicals and extreme heat. Copies of the certification data can be provided upon request and additional detailed images or viewing under specified lighting can be arranged to assist with appraisal or design planning.