1.42 Ct. Cobalt Spinel from Ceylon (Sri Lanka)

This transparent 1.42 carat oval cobalt spinel measures 7.61 x 6.32 x 3.89 mm, presenting a classic oval outline with a mixed brilliant cut that marries a brilliant style crown with a precisely executed pavilion. The cutter has optimized facet geometry to enhance light return and depth, producing controlled flashes and a deep, layered blue rather than a flat surface color. Clarity is graded eye clean at standard arm s length, with no windowing or bulky inclusions visible to the unaided eye, and polish is excellent across all facet planes, yielding crisp facet junctions and sharp facet reflections. Color intensity is described as intense, with rich cobalt saturation across the table and crown facets, and color distribution is uniform across the gem surface, which allows the stone to exhibit lively contrast and scintillation under variable lighting despite its saturated tone.

From a gemological perspective this spinel benefits from the isotropic optics inherent to spinel species, resulting in stable color appearance without pleochroic shift, and the hardness and robustness of spinel make it highly suitable for daily wear applications. The mixed brilliant faceting has been executed to ideal depth proportions for this material and size, balancing pavilion depth and table facet size to maximize brilliance while preserving weight, which is particularly important at 1.42 carats. No enhancement has been applied, the stone is natural and transparent, and the excellent polish highlights the cutter s attention to final lapidary finishing stages, including precise girdle execution and symmetrical pavilion and crown planning that improve setting compatibility and light performance when mounted.

At The Natural Gemstone Company we place provenance and ethical sourcing at the forefront of our selection criteria, and this cobalt spinel is documented with origin Ceylon, Sri Lanka, sourced through traceable supply channels that prioritize small scale mining communities and responsible procurement practices. For the conscious collector this gem represents a compelling combination of natural, untreated material, artisan cutting quality, and durable wearability, making it appropriate for investment, bespoke jewelry design, or a curated collection of ethically sourced colored stones. We can provide additional documentation on origin and handling upon request, and our team will advise on mounting options that preserve the integrity and display of the intense blue color while ensuring long term wear.