2.01 Ct. Ruby from Mozambique

This listing describes a C.Dunaigre certified Vivid Red ruby weighing 2.01 carats, cut in an emerald shape, with dimensions 9.01 by 6.02 by 3.66 millimeters. The stone is transparent with a clarity grade of very slightly included evaluated at eye level, and presents an intense color intensity with an excellent polish. The material has been heat treated, a standard and stable enhancement used to optimize color and clarity in corundum. The stated origin is Mozambique, and the gem is offered and documented through The Natural Ruby Company. These objective specifications are provided to assist appraisal and setting decisions, and to provide a clear record of the stone provenance and treatment history.

Optically the ruby demonstrates the characteristics expected from a well cut emerald step. The broad table and step facets concentrate the rich, vivid red face up appearance, producing even color distribution across the crown. The excellent polish contributes to crisp facet junctions and clean light return, allowing the stone to display broad, mirror like flashes rather than the pinprick scintillation associated with brilliant cuts. The transparent body allows internal light paths to remain visible under direct light, and the very slightly included clarity grading evaluated at eye level means that inclusions are minimal in the face up presentation, supporting an unbroken visual field of saturated red when viewed in standard lighting.

When compared to other gemstones in the red category the reflective behavior of this ruby is distinct. Corundum, which includes ruby and sapphire, has a refractive index near 1.76, and that physical property produces a lustre that ranges from vitreous to slightly more adamantine on well polished facets. Against spinel, which typically has a refractive index near 1.72, this ruby will show marginally stronger contrast and slightly crisper facet reflections, especially in a step cut where broad facet planes amplify differences in refractive response. Compared with garnet varieties used as red gems, which can have a somewhat higher refractive index and therefore a different quality of brilliance, this ruby maintains a cleaner and more controlled light return that emphasizes color rather than excessive fire. Tourmaline and other lower index materials will generally return less intense flashes and a softer overall sheen, making the corundum example notably more vivid under the same lighting conditions.

The emerald cut geometry modifies the usual expectations for corundum brilliance, in a manner that is often desirable for color saturated material. Where a brilliant cut seeks to maximize scintillation through many small facets, the emerald cut favors broad, directional flashes and a strong face color. For a vivid red ruby from Mozambique with the transparency and polish present in this example, that results in a sophisticated visual character that reads as deep and uniform red at typical viewing distances, while revealing controlled flashes along the step facets as the piece moves. This quality makes the stone well suited to ring settings that allow light to enter the pavilion, such as four prong and open gallery designs, or to elegant bezel settings that showcase the clean step facet planes. Documentation from C.Dunaigre and the presentation by The Natural Ruby Company provide objective confirmation of the gem attributes, and support confident selection for fine jewelry applications.