1.79 Ct. Spinel from Ceylon (Sri Lanka)

This blue spinel from Ceylon presented by The Natural Gemstone Company is a transparent oval weighing 1.79 carats, with calibrated dimensions of 9.55 by 6.17 by 3.60 millimeters. The stone is fashioned in an oval mixed brilliant cut, combining a brilliant facet arrangement on the crown with a more controlled pavilion faceting schema, and it is finished to an excellent polish. Clarity is graded as very very slightly included when evaluated at eye level, indicating that the inclusions are minute and do not materially interrupt clean visual transmission. The color is described as medium intense in overall saturation, with a true blue hue and a subtle inky sub tone that deepens along the girdle and pavilion facets. The specimen is natural and untreated, no enhancement, which preserves the original crystalline character and color chemistry associated with Sri Lankan spinel formation.

From a faceting and light performance perspective the mixed brilliant design of this oval is engineered to maximize face up brilliance while maintaining even color distribution. The crown carries a table and star and kite configuration that returns light as lively white flashes and blue spectral scintillation, while the pavilion facet planes are arranged to moderate windowing and to create balanced contrast across the length to width axis. The proportioned depth measures three point six zero millimeters, which corresponds to an approximate depth percentage of forty six percent relative to the mean diameter, producing a broad table presentation that emphasizes surface sparkle and a clean, open appearance in hand. The excellent polish contributes to crisp facet junctions and minimal surface abrasion, which accentuates the stone being singly refractive and isotropic, a fundamental optical characteristic of spinel that yields consistent color when viewed from different orientations.

In comparing hue and tone to gemstones from other famous locations, the blue of this Ceylon spinel differs materially from classic Ceylon sapphires, which are often described as bright cornflower blue with a lighter tone and higher blue violet component. The spinel displays a deeper, medium intense blue with less violet influence and a more neutral blue balance, producing a cooler impression compared with many Sri Lankan corundums. Against Kashmir sapphires the distinction is pronounced, because Kashmiri corundum typically exhibits a velvety, slightly diffused cornflower blue from silk inclusions, whereas the spinel is cleaner and more transparent, presenting defined facet reflections rather than a silky glow. Compared to Burmese blue spinels and Mogok region sapphires the Ceylon spinel sits between the two, it shares the depth and sober intensity of high grade Burmese material, but retains the clarity and lively refraction more akin to select Sri Lankan stones. When set beside Tanzanian or Mahenge spinels, which are known for vivid and sometimes warmer saturation, this Ceylon example reads as cooler and a touch more restrained in chroma.

Technically minded buyers will appreciate the gemological measurements and handling recommendations for this piece. Spinel has a refractive index in the region of one point seven one eight and a specific gravity near three point six, and a Mohs hardness of eight, making it robust for use in everyday wear with conventional settings. The absence of pleochroism due to isotropic crystal symmetry means the apparent color remains stable across viewing angles, unlike dichroic corundum where color shifts must be managed in orientation and cut. The stone is well suited to bezel or four prong settings that protect the girdle while allowing the table to present maximal brilliance, or to halo designs where the medium intense color benefits from contrasting accent stones. For collectors who value provenance, the Ceylon origin adds geological and historical context, and for connoisseurs who prefer untreated material this gem retains its natural optical and chemical signatures. The Natural Gemstone Company stands behind the reported properties and condition of this spinel, and we can provide additional magnification imagery, light performance analysis, and mounting advice to integrate this fine 1.79 carat oval blue spinel into a durable and visually optimized jewelry design.