10.19 Ct. Ruby from Mozambique

This cushion shape ruby, weighing an impressive 10.19 carats, represents a level of substance and presence that is rare in fine corundum. The face up dimensions measure 12.95 by 11.25 millimeters, with a depth of 7.18 millimeters producing an overall depth proportion of approximately 59.3 percent, a balanced ratio that supports strong face up color and efficient light return. The gem presents as transparent with a vivid color intensity described as purplish red, leaning to a pinkish red hue in certain light angles, a coloration that is highly sought after among connoisseurs and collectors. This particular piece has been certified as Purplish Red, and its substantial carat weight combined with vivid saturation creates the visual impact associated with premium rubies. The Natural Ruby Company is presenting this stone as an exemplar of Mozambique origin material, where large, richly colored rubies are increasingly available in fine qualities, and the 10.19 carat weight in this color range positions the stone at the premium end of the market.

From a cutting and light performance perspective, the stone has been fashioned in a mixed brilliant faceting style on a cushion outline, a decision that maximizes both scintillation and color saturation. The mixed brilliant approach integrates a brilliant facet arrangement on the pavilion with a combination of step and modified brilliant facets on the crown, creating a controlled interplay between brilliance and broad flash reflections. The crown facets are proportioned to concentrate color near the table, while the pavilion brilliant facets scatter light through multiple returns, producing lively scintillation without undue windowing. The cushion geometry, with softly rounded shoulders and slightly angled girdle planes, yields a generous face up appearance for its carat weight, and the overall cutting parameters favor color retention rather than excessive brightness loss. The excellent polish across facet junctions enhances facet crispness and allows for clean facet intersections, which in turn supports consistent light return and a pleasing balance of sparkle and depth.

Clarity evaluation renders the ruby as slightly included when observed at normal viewing distance, a practical and honest grade for a stone of this scale and natural origin. The internal characteristics are subtle enough to preserve transparency and do not significantly interrupt the continuous color plane, yet they provide identifiable fingerprint attributes typical of natural corundum from Mozambique. These characteristics, when present in moderate degree, can serve to confirm natural origin and to differentiate the material from synthetic or heavily treated alternatives. The stone has undergone routine heat treatment, a stable and widely accepted enhancement in ruby, applied to improve tone uniformity and to relieve fine silk that can mutethe apparent color. Post treatment, the stone exhibits clean facet windows and an even distribution of the purplish red saturation, with pleochroic behavior that shows slightly different intensities of purplish red and pinkish red on different axes, a descriptive trait that experienced setters and gemologists will use to orient the gem for optimal face up color in a mounting.

For the sophisticated buyer seeking a center stone that combines technical merit with visual authority, this 10.19 carat cushion ruby offers both practical and aesthetic advantages. Its dimensional proportions and mixed brilliant faceting make it suitable as a dominant center stone in high quality ring designs, where depth and table proportions will interact favorably with prong and bezel settings to present a deep, consistent field of color. The excellent polish and robust carat weight also favor jewelry types that emphasize the gemstone as the principal design element, including classic four or six prong solitaire settings, halo mounts that enhance apparent size while preserving color, and bespoke settings that use tapered shoulders to balance the stone visually. From an investment standpoint, rubies of this size and vivid purplish red saturation, with documented Mozambique origin and controlled heat treatment, occupy a niche segment where quality, transparency, and size converge, and The Natural Ruby Company can provide additional documentation and detailed imagery to support evaluation and placement in high end collections. Care for the stone should follow standard protocols for corundum, using gentle cleaning and avoiding harsh chemical exposure, while routine inspections of the mounting will ensure the integrity of any finished piece.