3.13 Ct. Pinkish Red Ruby from Mozambique

This listing describes a single transparent cushion shape ruby weighing 3.13 carats, presenting a pinkish red hue, with dimensions 10.39 by 7.52 by 4.15 millimeters. The cutting style is faceted, executed in a mixed brilliant cut to balance scintillation and depth of color, and the surface displays an excellent polish. Clarity is graded as included, evaluated at eye level, with characteristic internal features visible under close inspection that are consistent with natural formation and typical of rubies of this weight and color. The stone has undergone enhancement, heated with residue, a common and stable treatment used to improve color and clarity, and the provenance is Mozambique, a source noted for saturated and vivid rubies. The Natural Ruby Company provides this detailed specification to support informed evaluation of optical and structural attributes.

Optical performance is driven by the mixed brilliant faceting which emphasizes a lively return of light while preserving the stone presence and depth of tone. The color is described as vivid, indicating strong saturation and medium to dark tone that reads confidently in daylight and under artificial illumination. The cushion outline provides a softened rectangular silhouette with rounded corners, allowing larger table facets to showcase the primary color center, while the pavilion faceting contributes to internal reflections and fire. Transparency is described as transparent, which together with the vivid color intensity gives the ruby a clear and immediate visual appeal. The excellent polish ensures minimal surface disturbance to light transmission, and the included clarity grade gives an honest account of internal characteristics, which may be of interest to connoisseurs and to jewelry professionals assessing setting and design options.

Durability and care considerations are important for practical use and longevity, and on the Mohs hardness scale ruby rates at nine out of ten, reflecting its corundum composition. This positions ruby as one of the hardest gemstones routinely used in jewelry, exceeded only by diamond at ten, and harder than topaz at eight, quartz at seven, and common materials such as glass and most metals that may come into contact during wear. The high hardness makes this ruby well suited for daily wear in rings, pendants, and bracelets when properly set, however toughness and the presence of inclusions should also be considered when planning mountings. Given the included clarity, settings that protect the girdle and corners while allowing light to enter the stone are recommended, and professional setting methods such as bezel or secure prong work can reduce risk of impact damage to the corners of a cushion shape. Cleaning may be performed with warm soapy water and a soft brush, avoiding harsh chemicals and sudden temperature changes, and routine inspection by a qualified jeweler will help maintain secure settings and identify any changes related to the enhancement. The Natural Ruby Company documents the origin, treatment, and grading observations for this ruby to assist buyers and jewelers in matching the gemstone to appropriate designs, and to ensure transparency regarding its physical and optical properties.