0.81 Ct. Blue Cobalt Spinel from Ceylon (Sri Lanka)

This 0.81 carat cushion shape cobalt spinel from Ceylon, offered by The Natural Gemstone Company, measures 5.39 x 4.77 x 3.64 mm and presents an expertly executed mixed brilliant cut. The cutter has combined a modified brilliant crown with a more restrained, slightly stepped pavilion to maximize return of light while preserving the gem's intense color. The table is proportioned to emphasize color saturation without dampening scintillation, and the girdle is consistent, supporting stable setting options. Polish is graded excellent, providing crisp facet junctions and minimal surface disturbance. Color intensity is described as intense, with a dominant pure cobalt blue that displays subtle violet secondary tones when viewed at certain angles, a hallmark of high quality cobalt spinel from Sri Lanka. No enhancement has been applied to this piece, the transparency is notable, and the overall symmetry and facet alignment contribute to a balance of brilliancy and depth uncommon in stones of this size.

Internal features are present under magnification and serve as unique identifiers that add provenance and character rather than detract from beauty, the clarity is eye clean evaluated at eye level so these features do not impact visual performance in normal wear. Under loupe inspection you will observe minute pinpoint crystals and fine oriented growth zoning, occasional thin healed fissures and tiny reflective mineral inclusions consistent with natural crystallization in metamorphic environments. These inclusions create subtle internal texture that interacts with facet reflections, producing delicate pinfire flashes and occasional scintillation micro patterns, and they are useful diagnostic markers for gemological identification and origin verification. Given its 3.64 mm depth and cushion outline with mixed cutting design, this spinel sits well in open backed prong or bezel settings in white or platinum metals to accentuate the cool cobalt hue, or in warm metals to create contrast. For collectors and connoisseurs seeking a small yet technically superior natural cobalt spinel, this eye clean, intense, unenhanced Ceylon specimen is a refined example of thoughtful cutting and natural character, available through The Natural Gemstone Company.