1.89 Ct. Cabochon Alexandrite from Tanzania

This listing presents a translucent 1.89 carat oval shaped alexandrite, with dimensions of 7.18 by 6.28 by 4.25 mm, originating from Tanzania. The gem displays a greenish to brownish body color with medium color intensity, and it has been fashioned as a cabochon to emphasize body color and color change rather than faceted sparkle. Clarity is graded as very slightly included when evaluated at eye level, and the surface exhibits an excellent polish. There are no enhancements, and the natural origin and untreated state are reflected in the stone's inherent tone and hue. The Natural Gemstone Company provides this description based on direct examination, and the details above summarize the gemological attributes that define this example.

As a cabochon, this alexandrite presents its optical character in a manner distinct from faceted stones, and its perceived brilliance differs from more commonly encountered gemstones. Diamonds derive their brilliance from high refractive index and strong dispersion combined with precision faceting, producing intense white light return and fire. Faceted sapphires and emeralds emphasize saturated body color and polished facet reflections, yielding a different type of visual impact. Alexandrite, particularly in a cabochon form, does not aim for diamond like facet scintillation. Instead its appeal is in subtle surface luster, the depth of body color, and the dynamic response of the material to changes in illumination. The cabochon smoothing allows the eye to read the stone as a single, glowing plane of color, which in this specimen moves between greenish and brownish tones as the lighting conditions shift. The overall effect is not a high sparkle, but a rich, living color presence that is comparatively rare among popular gem varieties.

Beyond visual character, this piece stands out for its combination of attributes that are important to collectors and designers. The weight of 1.89 carat and the compact oval proportions make the stone suitable for a range of settings, including rings where the cabochon form will be protected, and pendants where the color change can be appreciated in varied lighting. The very slightly included clarity at eye level suggests the stone will present cleanly to most observers while retaining a natural internal texture that confirms its untreated status. The excellent polish enhances surface luster and tactile quality, contributing to the perception of richness even in the absence of faceted brilliance. From a gemological perspective, the rarity of alexandrite and the additional interest of a Tanzanian origin add contextual value, as each locality imparts subtle differences in hue and body tone. The Natural Gemstone Company includes full provenance and characterization information with this listing, to support informed selection and to accurately convey why this alexandrite stands apart from more common gemstones, not by sparkle alone, but by its color dynamics, natural state, and overall presence.