6.12 Ct. Ruby from Mozambique

This listing describes one natural, transparent ruby weighing 6.12 carat, presented in a classical emerald cut. The stone measures 13.26 by 8.65 by 4.81 millimeters, and it displays vivid color intensity with an excellent level of polish. Clarity is graded as very slightly included, evaluated at eye level, which indicates minimal internal characteristics that do not materially detract from the gem when viewed unaided. The ruby is untreated, with no enhancement reported, and the documented origin is Mozambique. The Natural Ruby Company has selected this example for its combination of size, transparency, and color saturation, and the technical details provided reflect measurements and observations taken under standard gemological viewing conditions.

The emerald cut form emphasizes the gemological qualities that matter most for this material. Step facets on the crown and pavilion create broad facet planes that showcase the ruby color in large, even flashes, and the generous table allows for clear sight through the stone, demonstrating its transparent character. Because the cut emphasizes color rather than strong scintillation, the vivid red hue appears steady and resolute across the face of the gem, with subtle internal reflections that add depth without distracting brilliance. The very slightly included clarity grade means that the inclusions are minor and generally not visible at a casual viewing distance, which supports the clean visual presentation typical of higher grade step cut stones. The excellent polish ensures crisp facet junctions and clean light return from each plane, enhancing the formal elegance that emerald cut stones communicate in both contemporary and traditional jewelry designs.

Durability is an important consideration for a gemstone of this size and intended use, and rubies sit high on the Mohs scale of mineral hardness with a value of nine. In practical terms, this places ruby one step below diamond, which rates ten, and equal in hardness to sapphire, which also rates nine, making ruby highly resistant to scratching from most materials encountered in daily wear. By comparison, commonly used gemstones such as topaz have a Mohs hardness of eight, and quartz based gems rate seven, which are more prone to surface wear when exposed to abrasive contact. The high hardness combined with the excellent polish of this emerald cut ruby supports its suitability for ring center stones, pendants, and other pieces that receive regular wear, provided that appropriate setting and care measures are observed. Routine inspection of the setting, avoidance of sharp knocks on metal edges, and sensible handling will preserve the pavilion and girdle integrity over time.

Care and setting recommendations for an unenhanced Mozambican ruby of this profile emphasize protection and long term preservation. A secure prong setting or a rim oriented bezel setting will protect the gem edges and reduce the risk of accidental contact, while allowing the face up color and step facet planes to remain visible. Cleaning may be accomplished with a mild detergent solution and a soft brush, rinsed with warm water and dried with a clean lint free cloth, and professional ultrasonic or steam cleaning should be considered only after consultation with a qualified gemologist, given the value and size of the stone despite its untreated status. Given the documented origin of Mozambique and the absence of treatment, this ruby represents a natural example with stable physical properties and consistent color saturation. For further technical details, including available certification, imaging at different lighting angles, and custom mounting options, please contact The Natural Ruby Company, where we can provide additional measurements, recommended setting alternatives, and a current independent report upon request.