0.73 Ct. Ruby from Tanzania

This cushion shape ruby weighs 0.73 carat, with precise dimensions of 6.09 x 5.02 x 2.69 millimeters, and a depth ratio approximately 48.4 percent, proportions that reflect an intention to balance color saturation with optimal light return. The cutter selected a mixed brilliant cut, combining a brilliant facet arrangement on the crown with modified step facets on the pavilion to enhance both scintillation and internal color flash. The stone is transparent, with a clarity grade reported as very slightly included when evaluated at eye level, indicating inclusions that are minor and do not interrupt the passage of light through the table facet. Color is described as vivid in intensity, a strong, saturated red that remains evenly distributed across the table and crown facets, and the piece is untreated, no enhancement. Polish is graded excellent, resulting in crisp facet junctions and high surface luster. Origin is Tanzania, a source that has produced stones with intense saturation and attractive tone, and The Natural Ruby Company presents this gem with clear attribution to that locality.

From a cutting and craftsmanship perspective this ruby demonstrates considered decisions made to preserve weight while maximizing optical performance. The mixed brilliant cutting scheme employed here uses smaller crown facets to produce controlled brilliance and larger pavilion facets to channel color back through the crown, a technique often used when the natural rough contains zones of stronger saturation. Facet symmetry appears well executed in the photographs, with consistent facet size and alignment that minimize light leakage and foster a lively face up appearance. The excellent polish minimizes diffusion of light at facet interfaces, preserving sharp contrast between bright flashes and dark return areas. A girdle finished to a uniform thickness ensures secure mounting without unnecessary removal of material, and the slightly reduced depth enables a compact, wearable profile for everyday jewelry.

As an investment in both beauty and technical merit this ruby offers several compelling qualities. Being an untreated, vivid Tanzanian ruby under one carat places it in a niche that appeals to connoisseurs who prioritize natural state and provenance, because untreated rubies with strong color command collector interest and stability in secondary markets. The very slightly included clarity at eye level means the gem appears clean to the naked eye, which enhances perceived value, while the transparent material and mixed brilliant faceting combine to produce excellent light performance for its size. Corundum is second only to diamond in hardness, registering nine on the Mohs scale, so this ruby is durable enough for daily wear in traditional ring settings, and the excellent polish helps resist visible surface abrasion by maintaining a smooth finish.

At The Natural Ruby Company we emphasize both the material attributes and the human craft that produce stones of enduring appeal. This 0.73 carat cushion ruby is ideal for a classic four or six prong solitaire setting that permits maximum light entry through the crown, and it also adapts well to low bezel settings where the uniform girdle thickness provides security without sacrificing face up brilliance. Collectors who appreciate technical cutting choices will value the mixed brilliant approach here, and those focused on gemological purity will value the untreated status and Tanzanian origin. In sum this ruby represents a measured intersection of geological rarity, disciplined lapidary technique, and enduring design potential, making it an investment in both aesthetic quality and craft that will retain desirability for years to come.