1.63 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This transparent 1.63 carat round yellow sapphire measures 7.17 x 7.09 x 4.37 mm, and presents a mixed brilliant cut, eye clean clarity at standard viewing distance, intense color intensity, and excellent polish, unenhanced and originating from Ceylon Sri Lanka. The mixed brilliant faceting combines a brilliant style crown with a more controlled pavilion faceting strategy, producing crisp facet junctions and a lively pattern of scintillation while maintaining deep color saturation. The measured proportions yield an average diameter of 7.13 mm and a depth to diameter ratio of approximately 61 percent, a proportion that favors efficient light return and balanced face up brightness without washing out the intense yellow hue. Excellent polish ensures that facet planes behave as precise mirrors, minimizing light diffusion and maximizing contrast between bright and dark facet facets, which translates to strong pinpoint scintillation and well defined flashes under varied light sources.

Compared with other gems in the same category, this Ceylon yellow sapphire exhibits the characteristic optical behavior of corundum, with a refractive index around 1.76 to 1.77 that yields strong brilliance while producing less spectral dispersion than diamond, so fire is more restrained and color driven brilliance dominates. Against common alternatives, such as spinel and topaz, which have lower refractive indices and therefore softer light return and broader, less intense flashes, this sapphire shows tighter, more energetic scintillation and superior overall brightness. Versus step cuts that emphasize color over sparkle, the mixed brilliant format here preserves intense yellow saturation while delivering the lively return of light expected from a brilliant influenced faceting scheme. Unenhanced Ceylon material often displays a distinct clean and lively hue compared with heavily treated stones, and the eye clean clarity of this piece creates unobstructed internal light pathways, further enhancing perceived brilliance compared with similar weight stones that contain visible inclusions. For clients seeking a gemstone that balances vivid natural color, technical cutting precision, and optimal optical performance, this specimen from The Natural Sapphire Company represents a technically superior choice ready for high quality settings.