4.03 Ct. Ruby from Mozambique

This piece presents a transparent 4.03 carat oval ruby, with precise dimensions of 10.55 by 8.84 by 4.91 millimeters, sourced from Mozambique, and offered by The Natural Ruby Company. The gem is fashioned in an oval outline with a mixed brilliant cut, combining the light performance attributes of brilliant faceting on the crown with a modified pavilion architecture that emphasizes color saturation. Measured depth is approximately 50.7 percent, a proportion that supports an optimal balance between face up spread and internal light return for this shape and size. The color is classified as vivid intensity, delivering a saturated, deep red that displays rich chroma in both direct and diffused lighting. Clarity has been graded as very slightly included when viewed at eye level, with inclusions that are minor and generally confined beneath facet junctions, preserving excellent transparency. The finish is noted as excellent polish, with crisp facet junctions and a smooth girdle profile, and the stone has received standard heat treatment to enhance clarity and color stability.

From a lapidary engineering perspective, the mixed brilliant execution on this oval ruby is designed to marry scintillation with color depth. The crown is cut with multiple small star and kite facets that scatter light across the table plane, creating dynamic flashes that animate the vivid red body color. The pavilion geometry is modified to reduce light leakage through the base, using elongated facets that channel light back through the crown in a manner that intensifies perceived saturation. The oval outline has been proportioned to avoid excess spread loss along the length axis, while maintaining sufficient width for an attractive face up appearance. The table facet has been retained at a size that balances brilliance and color, allowing for strong return of red flashes without creating a flat window effect. Attention to facet symmetry and pavilion alignment during cutting minimizes extinction zones, so the stone reads uniformly colored when mounted in typical jewelry orientations.

Clarity and surface finish considerations are crucial for a collector who assesses gemstones by both optical purity and structural integrity. The very slightly included grade at eye level indicates that inclusions are present but unobtrusive to unaided observation, and in this specimen they appear as fine internal features that do not intersect the girdle or surface, thereby preserving durability. Heat treatment has been applied, a conventional and stable enhancement for ruby that reduces the prominence of rutile silk and improves hue uniformity, while remaining fully accepted within the trade when disclosed. The excellent polish manifests as smooth, reflective facet planes and well executed facet junctions, outcomes of controlled polishing sequences and hand finishing. The girdle is finished to facilitate secure setting, and the pavilion termination is free of undue nicks or abrasions, which reduces the risk of chipping during mounting. For settings that prioritize protection and longevity, this oval profile performs well in semi bezel and four prong mounts, and the stone will also present attractively in low profile bezels where face up color depth is desired.

Ethical sourcing and responsible stewardship are central to how The Natural Ruby Company brings this ruby to market, attributes that matter to the conscious collector. This stone originates from Mozambique, a region that has become an important source of quality rubies, and our procurement practices emphasize transparency, chain of custody, and partnerships with local stakeholders. We work with supply chain partners who implement fair labor practices, and who take steps to mitigate environmental impact during extraction and initial processing. Documentation of origin and treatment history is provided with the stone, supporting buyer confidence and traceability. For the conscientious buyer seeking an investment quality colored gemstone, this ruby represents a blend of technical cutting excellence, gemological integrity, and ethical sourcing credentials. It is well suited for bespoke commissions, heirloom ring designs, and focused collections where color intensity and workmanship are primary selection criteria. Care recommendations include routine professional inspection of settings, avoidance of harsh chemicals during wear, and storage in separate padded compartments to prevent abrasion to polished facets.