1.70 Ct. Ruby from Mozambique

This description concerns one transparent ruby weighing 1.70 carat, fashioned into an oval shape with dimensions of 8.36 x 6.31 x 3.70 mm, presented by The Natural Ruby Company. The stone is cut in a mixed brilliant style that balances pavilion depth and crown facets to enhance light return and color saturation. Clarity is graded as very slightly included when evaluated at eye level, a designation that reflects only modest internal features that do not materially detract from the gem appearance under normal viewing. Color is described as vivid in intensity, delivering a rich, saturated red that reads clearly across the pavilion and crown. The surface finish is classified as excellent polish, producing crisp facet junctions and lively reflections. Enhancement has been applied through controlled heat treatment, a standard and stable practice used to refine color uniformity and to reduce the visual impact of microscopic inclusions, while preserving the gem structural integrity and overall natural character.

Visually, this ruby displays a combination of transparency and depth that allows the vivid red hue to transmit cleanly through the stone, while facet geometry creates scintillation and internal flashes of lighter red that articulate movement as the gem is viewed from different angles. The mixed brilliant cut provides a balance between brilliance and face up color, with larger crown facets contributing to color saturation and smaller pavilion facets offering return of light. At 1.70 carat and at the given dimensions the stone sits in a size category that is versatile for a range of fine jewelry designs, including classic solitaire and refined three stone settings. The very slightly included clarity grade indicates that inclusions are minor and typically require magnification to be fully assessed, allowing the ruby to present strongly in hand and to photograph well under both natural and controlled lighting.

To imagine the origin of this ruby is to consider processes that unfolded over millions of years beneath the surface of the earth. Deep within a convergent tectonic regime, layers of aluminum rich host rock were subjected to intense pressure and elevated temperatures as continental plates interacted. In that environment, chromium and related trace elements were present in low concentrations within the geologic sequence. Under the right combination of pressure, temperature, and chemical environment, aluminum ions in corundum lattice sites were partially substituted by chromium ions, a substitution that gives rise to the red color that defines ruby. Crystallization occurred slowly in pockets and veins that provided space for corundum crystals to grow, and variations in the local chemistry produced zones of differing color intensity and inclusion patterns. Subsequent tectonic uplift exposed the metamorphic terranes to erosion, and over time crystals were liberated from their host medium and concentrated in place or moved by fluvial systems. The ruby now offered by The Natural Ruby Company is a direct product of that deep time history, a single crystal whose internal architecture and color are records of complex geological events that span millions of years.

The documented technical properties support a clear understanding of value and use. Weight at 1.70 carat, and the exact millimeter measurements of 8.36 x 6.31 x 3.70 mm, provide precise parameters for setting design and mounting decisions. The mixed brilliant cut and excellent polish indicate careful lapidary work intended to optimize light performance while preserving weight and face up color. The clarity assessment of very slightly included at eye level acknowledges natural internal features without implying significant visual detriment. Color intensity classified as vivid denotes a high degree of saturation, and the Mozambique origin places the stone within a recognized and established geographic provenance for high quality rubies. Heat treatment is disclosed as the applied enhancement, consistent with industry practice to stabilize and improve color, and this treatment is stable under normal wear conditions. For routine care, the stone benefits from gentle cleaning with warm water, mild soap, and a soft brush, and it is advisable to avoid exposing the gem to harsh chemicals or extreme thermal shock.

At The Natural Ruby Company we document provenance and treatment and provide further imagery and gemological information upon request to support appraisal, design, and conservation decisions. The combination of natural origin, precise cut, strong color, and conservative clarity grading make this 1.70 carat oval ruby a specimen that communicates both geological narrative and practical suitability for fine jewelry. Our presentation aims to supply factual, verifiable details so that designers, gemologists, and private collectors may assess the stone on its intrinsic qualities. For additional data, certification options, or guidance on mounting and care, The Natural Ruby Company can provide expert support and documentation tailored to professional or personal needs.