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

This transparent 1.29 carat cobalt spinel from Ceylon displays a precise emerald cut, with exact dimensions of 7.05 x 5.49 x 3.93 mm, and a faceting scheme that emphasizes step cut geometry and linear light return. The pavilion and crown have been proportioned to produce parallel broad facets that create a hall of mirrors effect, preserving saturation while directing vivid blue flashes through the table. Clarity is graded as very very slightly included when evaluated at eye level, which indicates that the inclusions do not obstruct the major facet intersections and therefore do not compromise the gem s transparency or its optical performance. The polish is excellent, yielding crisp facet junctions and minimal surface disturbance, which enhances the stone s ability to maintain sharp facet contrast and controlled light leakage. No enhancements have been applied, so the cobalt derived blue is entirely natural, presenting unaltered chroma and tone that are characteristic of high quality Sri Lankan spinel. The gem s truncated corners and balanced table to depth ratio support secure mounting options while maintaining ideal light dynamics for step cut forms.

This cobalt spinel is versatile for both casual and formal settings, adapting equally well to minimalist everyday jewelry and to statement pieces for evening wear. In a solitaire ring setting the emerald cut emphasizes the stone s architectural lines and elegant color, while a bezel or low gallery setting will protect the pavilion and preserve the clean top view for active daily wear. For formal jewelry the stone s vivid intensity and excellent polish respond beautifully to thin halos of small brilliant cut stones, which introduce scintillation without diluting the pure blue of the spinel. The size and proportions are well suited to pendants and cufflinks where the linear facet pattern contributes to refined movement and consistent color presentation under changing light. Offered by The Natural Gemstone Company, this cobalt spinel combines gemological integrity, precise cutting, and authentic Ceylon provenance, making it a technically superb choice for connoisseurs seeking a durable, naturally vivid blue gemstone that performs with restraint in daytime ensembles and with presence in formal compositions.