7.05 Ct. Ruby from Mozambique

This GIA certified Mozambique ruby from The Natural Ruby Company is a rare combination of size, transparency, and cutting precision, weighing 7.05 carats with dimensions of 12.34 by 9.84 by 7.07 millimeters. The stone is fashioned into a classic oval, with a mixed brilliant cut that pairs a brilliant facet arrangement on the crown with carefully proportioned pavilion facets. This mixed approach preserves face up color saturation while maximizing internal light return. The clarity is graded very slightly included at eye level, which means inclusions are minimal and do not compromise the stone s transparency or light performance. The polish is excellent, and the overall finish shows crisp facet junctions and consistent symmetry, which are essential to achieving precise optical behavior in a natural ruby of this scale.

Technically, corundum has a relatively high refractive index, approximately 1.762 to 1.770, and a modest dispersion of around 0.018, which together govern how the stone bends and separates light. In this ruby, those intrinsic optical constants are exploited by the cutter s decisions, the mixed brilliant geometry producing both strong contrast and lively scintillation. The crown facets break incident light into numerous small returns, producing sparkle across the table and crown, while the pavilion facets function to reflect that light back through the crown. The very slightly included clarity grade allows near unobstructed light transmission, so each facet plane acts as an efficient mirror, creating repeated red flashes and well defined contrast. The vivid color intensity further amplifies perceived brilliance, because strong absorption in selective wavelengths increases contrast between bright facet reflections and darker internal zones, making each flash of light appear more saturated and vibrant.

Craftsmanship details make a measurable difference in perceived sparkle, and this ruby displays deliberate cutting choices that prioritize both color and brilliance. The mixed brilliant cut concentrates pavilion angles and facet sizes to avoid windowing and to increase light return for the face up presentation, while maintaining enough depth to retain the stone s vivid color. The excellent polish minimizes surface scattering and enhances specular reflection from each facet, so that micro reflections remain sharp even under small movements. Heat treatment has been applied in accordance with trade standards to stabilize and intensify the chromium driven red, reducing silk and other minute inclusions enough to allow the stone s internal reflections to dominate. The result is a dynamic balance between saturated red body color and crisp, scintillating highlights, a balance that is difficult to achieve in larger natural rubies without precise facet planning.

Viewed in use, the combination of material properties and lapidary execution gives this ruby a sparkle that is distinct from other gemstones, and distinct among rubies as well. The high refractive index ensures strong internal reflection, the mixed brilliant architecture creates both broad flashes and pinpoint scintillation, and the vivid Mozambique color provides chromatic intensity that registers as deep, lively red flashes rather than washed out tone. At 7.05 carats, the stone s scale allows light paths that produce layered reflections, so that movement yields a complex sequence of bright returns and deeper color zones, enhancing perceived depth and life. For the collector or connoisseur seeking a ruby where structural optics, precise faceting, and conservation of natural color converge, this GIA certified piece from The Natural Ruby Company represents a technical and aesthetic exemplar, a stone engineered by expert cutting and validated by certification to deliver a level of sparkle and color intensity that will command attention in any setting.