0.66 Ct. Ruby from Mozambique

This exceptional natural ruby offered by The Natural Ruby Company is a transparent round gem weighing 0.66 carats, with precise dimensions of 5.10 x 5.02 x 3.44 mm. It is fashioned in a mixed brilliant cut that marries the scintillation of a brilliant facet arrangement with the depth and fire delivered by a modified pavilion design. Clarity has been evaluated at eye level as very very slightly included, indicating that the stone is exceptionally clean to the unaided eye, with only minute internal characteristics that do not detract from its overall appearance. The color displays vivid intensity, a saturation and tone that read as a pure, lively red, and the polish has been executed to an excellent standard, producing crisp facet junctions and a bright, reflective table. Enhancement has been disclosed as heat treatment, a long established and stable process used to improve color and clarity in corundum, and the ruby’s reported origin is Mozambique, a source that has become increasingly respected for producing richly colored, market desirable rubies.

From a gemological perspective this ruby checks many boxes that educated buyers look for. The mixed brilliant cut has been optimized to return light efficiently from the crown and pavilion, yielding strong brilliance and lively sparkle even in smaller sizes. The dimensions relative to the weight suggest good cutting proportions, meaning the gem has been shaped to maximize face up presence and color saturation without unnecessary weight loss. The clarity description very very slightly included at eye level tells a knowledgeable purchaser that inclusions are minute and not visible under normal viewing conditions, which preserves both the aesthetic purity and the potential resale appeal of the gem. Color is the single most important value driver in rubies, and vivid color intensity places this stone in a premium category, as intense, well saturated red tones command higher demand and price. Excellent polish complements the cut and clarity by ensuring each facet reflects and refracts light with minimal light leakage. Taken together, these attributes make this ruby a rare combination of desirable traits in a 0.66 carat size.

Durability is one of the strongest practical arguments for selecting a ruby for everyday jewelry, and this example is well suited to daily wear. Rubies are corundum, registering nine on the Mohs hardness scale, second only to diamond in natural gem materials. This innate hardness confers outstanding resistance to scratching and abrasion, which is why rubies have a long history of use in rings, pendants, and bracelets that receive frequent wear. The structural toughness of corundum also provides good resistance to chipping when set properly, although like all gemstones care must be taken to protect edges and facets from hard knocks. Because this ruby has only been heat treated and not fracture filled, typical household cleaning methods such as warm soapy water, soft brushes, and even ultrasonic or steam cleaning used by reputable jewelers are generally safe. For daily wear I recommend a secure mounting, ideally a protective bezel or prong setting with well maintained prongs, and routine inspection by your jeweler to ensure the mounting remains sound. Avoid exposing the stone to strong acids, prolonged high heat, or rough abrasive contact, and store it separately from harder stones to prevent incidental surface wear.

The Natural Ruby Company stands behind the provenance and disclosed treatments of the gems we present, and this Mozambique ruby embodies several attributes that make it an excellent choice for discerning buyers and collectors. Mozambique has emerged as a significant source of high quality rubies in the global market, and gems from this region often display vivid, saturated colors that appeal to connoisseurs. Heat treatment in rubies is widely accepted in the trade as a permanent and stable enhancement when properly disclosed, and it improves both color and clarity without otherwise altering the gem’s natural corundum structure. For buyers focused on investment quality as well as immediate beauty, the combination of vivid color, eye clean clarity, excellent polish, and secure cutting proportions in a classic round shape offers versatility for a wide range of jewelry applications, from elegant solitaires to refined halo rings or bespoke designs. If you would like additional documentation, gemological certification options and detailed imagery are available through The Natural Ruby Company to support evaluation and valuation. We encourage prospective buyers to contact us for any further technical information, setting recommendations, or to discuss custom design possibilities, as we are committed to transparency and to helping clients select rubies that align with both their aesthetic preferences and long term value expectations.