6.09 Ct. Ruby from Mozambique

This cushion shape ruby presents a technical profile that will appeal to the discerning collector, weighing 6.09 carats and measuring 12.02 x 9.87 x 5.33 millimeters. Origin Mozambique, the stone exhibits a vivid color intensity that reads orangish red in a range that balances warmth and saturation. The cutting style is a mixed brilliant, combining a faceted crown with a predominantly brilliant pavilion to optimize both color saturation and light return. Clarity is graded slightly included at eye level, and the surface finish is an excellent polish, indicating meticulous lapidary work. The ruby has been heat treated, an industry standard enhancement that stabilizes and deepens color while reducing fine silk and other clarity effects. This gem is offered through The Natural Ruby Company, and it embodies the technical hallmarks we prioritize when selecting pieces for clients who value both optical performance and gemological integrity.

The mixed brilliant faceting is engineered to exploit the ruby crystal s refractive index and critical angle, providing maximal internal reflection while preserving face up color. In this specimen the physical depth relative to the average diameter is approximately 48.7 percent, a depth that aligns with optimal light recycling for medium to strong saturation rubies. The cushion outline with softened corners allows the cutter to deploy a combination of larger crown facets that act as light collectors, and smaller pavilion brilliants that fragment returned light into highly visible flashes. This deliberate distribution of facet sizes controls the balance between broad, saturated color patches and pinpoint scintillation, so that the gem reads richly colored from a distance, while revealing lively return of white light and fire at closer inspection. Facet junctions are cut to tight tolerances to reduce light leakage at the girdle and to preserve contrast between light and dark facets, which is essential in a colored stone that must maintain both depth of hue and optical dynamics.

Clarity and polish play a critical role in the way inclusions interact with light in a ruby, and this stone s slightly included grade is handled with technical care by the cutter and the heat treatment process. Slight inclusions at the eye level are present, but they do not materially interrupt the overall color field thanks to the cutter s strategy of orienting major facets to mask high contrast inclusions and to route light around them. Heat treatment has likely reduced fine rutile silk and healed minor fractures, improving transparency while retaining natural character. The excellent polish enhances specular reflection from facet planes, improving the gem s windowing profile and increasing perceived brightness. When light enters the crown it is quickly restrained by the pavilion geometry to remain within total internal reflection pathways, and the polished facet planes then return that light as both broad color and localized brilliance. Slight inclusions can, in controlled circumstances, contribute to a velvety depth that increases perceived saturation, and in this ruby that effect complements the vivid color without degrading the optical performance required for high end jewelry.

From a setting and design standpoint the cushion form and the well executed mixed brilliant cutting offer both flexibility and technical advantage. The generous 12.02 by 9.87 millimeter face up enables a strong visual footprint in prong or bezel work, and the controlled depth preserves table presence without sacrificing internal light management. For designers seeking a balance of color and sparkle the stone performs reliably, producing consistent color from multiple viewing angles while delivering flashes of brilliance that animate movement. Craftsmanship considerations such as precise symmetry, consistent facet angles and an even girdle are evident in the way the stone handles light, and these features will simplify mounting while minimizing the need for extensive reworking. At The Natural Ruby Company we can provide additional gemological data and high resolution imaging on request, and our team is available to advise on ideal settings that maximize face up color and optical return for this 6.09 carat Mozambique ruby.