1.07 Ct. Blue Spinel from Ceylon (Sri Lanka)

This 1.07 carat blue spinel from Ceylon is presented in a precise emerald cut, measuring 6.53 x 5.18 x 3.48 millimeters, with an overall depth of approximately 59.5 percent. The cutting proportions have been executed to balance table and step facets so as to maximize internal light return within the constraints of spinel refractive index and the stone dimensions, producing substantial face up saturation without excessive windowing. The color is classified as intense, a deep blue with neutral to slightly cool tone, stable and evenly distributed across the table and bezel facets, which is consistent with high quality Sri Lankan material. Clarity is graded as slightly included at eye level, a condition that is communicated accurately and conservatively, and polish is excellent with crisp facet junctions and fully rounded girdle edges. No enhancement has been applied to this stone, the color and clarity are natural, and the combination of natural origin and careful cutting renders a gem that performs with a fine balance of color saturation and transparency.

From a faceting perspective the emerald cut on this piece follows a classical step cut geometry, with a broad rectangular table, parallel crown and pavilion steps, and beveled corners that reduce vulnerability to chips when set in typical prong or bezel mounts. The pavilion depth and step proportions were chosen to minimize contrast windows and to emphasize color in this medium to deep stone. The absence of birefringence in spinel means the color appears consistent when the stone is rotated under light, and the low pleochroism of spinel provides a uniform face up appearance, making the emerald cut an excellent choice for presenting saturated blues without the distraction of color shifting. Technical properties relevant to handling and setting include a hardness around 8 on the Mohs scale and a specific gravity near 3.58 to 3.61, which inform decisions about bezel thickness and prong placement for long term wear and durability.

Inclusions within this spinel serve as natural identifiers and contribute to the gemological personality of the stone, rather than detracting from it. Under loupe and low magnification the inclusions present as a combination of small crystal fingerprints and thin feathered stress features, with occasional internal reflective platelets and subtle growth zoning aligned with the natural crystal faces. A couple of inclusions appear close to the pavilion facet junctions and a small pinpoint is visible under the table when viewed at certain angles, which is the basis for the slightly included at eye level clarity grade. These features do not interfere significantly with the face up brilliance or the intense color, and they provide a map of internal formation that can be used as reference points for future identification and provenance verification. Inclusions of this type are often useful when documenting natural, untreated spinel, and when compared with inclusions from regional material they can be consistent with Ceylon origin, reflecting the typical crystallization environment of Sri Lankan spinel deposits. The Natural Gemstone Company provides full transparency about internal characteristics, and we offer detailed imaging and magnified views for buyers who require documentation for certification or bespoke setting work. If you require additional angles, measurement confirmations, or recommendations for mounting this emerald cut blue spinel in a ring, pendant, or custom design, please contact The Natural Gemstone Company for technical advice and professional handling guidance.