1.68 Ct. Ruby from Mozambique

This pear shaped red ruby weighs 1.68 carats and measures 7.81 by 6.47 by 4.15 millimeters, presenting a classic teardrop silhouette that is exceptionally versatile for both solitaire and more elaborate settings. The gem is faceted with a mixed brilliant cut, a design that couples a faceted pavilion with a brilliant crown to enhance light performance while preserving the deep, saturated color. Color intensity is described as intense, and the hue reads as a rich, vibrant red that displays consistent saturation across the stone. The clarity has been graded as eye clean when evaluated at eye level, indicating that there are no inclusions visible to the naked eye that disrupt the visual appeal. The polish has been judged excellent, which further maximizes the stone s surface reflection and contributes to crisp facet junctions and lively internal scintillation. Origin is Mozambique, a region known for producing rubies with strong, market desirable tones, and the stone has undergone lattice diffusion enhancement, a treatment that has penetrated the crystal lattice to improve color uniformity and depth.

For the educated buyer it is important to understand the specifics of grading and treatment, and how they affect both appearance and value. Eye clean clarity means that the stone will present a visually clean window of color without the cloudiness or visible needle like inclusions that can soften light return. The mixed brilliant cut is chosen deliberately to balance fire and brilliance with color retention, because when a ruby is cut to maximize brilliance without losing color, the result is an intense, lively gem that demonstrates both sparkle and depth. Lattice diffusion is a thermal process that diffuses color producing elements into the corundum lattice at high temperature, and when disclosed it is an accepted enhancement in the trade. Lattice diffusion typically results in permanent color under normal wear and cleaning conditions, but it is regarded differently in pricing compared to natural, untreated rubies because the treatment alters the intrinsic color chemistry of the stone. At The Natural Ruby Company we provide full disclosure of enhancements and provenance, and we can supply independent laboratory reports on request to document the nature and extent of treatment.

When comparing brilliance and optical performance to more common gemstones, the corundum family of which ruby is a member occupies a specific place in the spectrum of light behavior. Rubies have a refractive index that is higher than most popular colored stones such as spinel and many garnets, and this means that a well cut ruby can return light with strong, saturated flashes of red. Compared to diamond, which has a much higher refractive index and therefore a different kind of brilliance characterized by white light fire and extreme sparkle, a ruby s brilliance is subtler and dominated by its color rather than by white fire. Compared to blue sapphires, which are also corundum, red rubies can appear more luminous because the human eye is particularly sensitive to the red wavelengths that rubies emit, and a mixed brilliant cut amplifies that effect by directing light into the most flattering angles. Compared to spinel and garnet, this Mozambique ruby shows greater depth of color and a more gemlike transparency when eye clean, which leads to a richer visual presence in jewelry.

From a practical standpoint the stone s hardness and polish make it an excellent candidate for daily wear, though as with all precious stones prudent handling is advised. Corundum rates very high on the hardness scale, which means scratches are uncommon in normal wear, but knocks and thermal shocks should still be avoided, and ultrasonic and steam cleaning should be discussed if the ruby is set, given its lattice diffused enhancement. For routine maintenance warm soapy water and a soft brush is both safe and effective. The provenance from Mozambique adds to the gem s desirability, as that region has become a key source of vivid rubies in the modern market. At The Natural Ruby Company we stand behind the accuracy of our descriptions and the photographs we provide, and we welcome requests for additional imagery, light performance studies, and third party laboratory documentation to support confident purchasing decisions.