37.13 Ct. Cabochon Ruby from Mozambique

Presenting an exceptional natural ruby from The Natural Ruby Company, a translucent, C.Dunaigre certified Intense Red ruby of considerable presence and beauty. This stone weighs 37.13 carats, and is fashioned in a trillion shape with measurements of 21.95 by 21.52 by 8.00 millimeters, a scale that makes it ideal as a focal point for a bold ring or a spectacular pendant. The cutter chose a cabochon finish to emphasize the rich, visceral color and to create a smooth, luminous dome that glows from within. Color is the defining feature, the Lab Color Classification by the C.Dunaigre report is Intense Red, and the gem exhibits vivid color intensity that draws the eye and holds attention. Clarity is graded very slightly included when evaluated at eye level, which contributes to the gem character without distracting from its overall visual impact, and the polish is excellent, resulting in a silky surface and lively, deep reflections. The enhancement is heat treatment, a common and accepted practice to optimize color and clarity, and the ruby is documented as originating from Mozambique, a source known for producing rubies of saturated color and fine tone.

Visually this ruby offers a compelling combination of richness and presence, the trillion outline gives the piece a modern geometry while the cabochon smoothing adds a classical softness, creating a versatile gem that complements both contemporary and traditional settings. The translucent body color allows light to move through the stone in a way that enhances the intense red hue, producing internal flashes and subtle color zoning that reward close inspection. At this size the gem becomes a statement, whether set as the center of a custom engagement ring, framed in a pendant to be worn close to the heart, or displayed in an heirloom brooch that will be passed down through generations. The clean, polished dome makes the surface feel luxurious to the touch, and the triangular silhouette sits comfortably against the skin or in a bezel that emphasizes its shape. Designers will find this ruby responsive to a range of metal choices, warm 18 karat yellow gold to heighten the red glow, rose gold to create a romantic marriage of hues, or white metal to provide crisp contrast and modern edge.

As stewards of fine natural rubies, The Natural Ruby Company stands behind the provenance and the lab report that accompanies this stone, the C.Dunaigre certificate provides independent verification of the Intense Red classification, the weight, the measurements, and the reported treatment, giving confidence to collectors, designers, and clients who seek both beauty and documented authenticity. For care, treat this ruby as a precious gem, avoid exposure to harsh chemicals and extreme temperatures, clean gently with warm soapy water and a soft brush, and when in doubt seek professional cleaning by a trusted jeweler, ultrasonic cleaning is not recommended without professional assessment because of the sensitized surface from the cabochon cut and the heat treatment history. We can assist with custom design services, secure insured shipping, and advice on setting options that protect the stone and showcase its unique color, our specialists can provide sketches and recommendations to translate this ruby into a wearable masterpiece. If you would like additional photos, magnified detail images, or to discuss reserve and purchase options, please contact The Natural Ruby Company and one of our experienced gem advisors will guide you through every step.