0.84 Ct. Orange Fire Opal (Flame Opal) from Mexico

This Fire Opal, Flame Opal from The Natural Gemstone Company is a finely transparent 0.84 carat oval, with precise dimensions of 7.31 by 6.08 by 4.16 millimeters, cut in a faceted mixed brilliant style, with a clarity grade of very slightly included when evaluated at eye level, a vivid color intensity, and an excellent polish. The piece is natural, originating in Mexico, and it has received no enhancement. These measured attributes define the gem in technical terms that matter to connoisseurs, combining a compact weight with an optimized silhouette that favors both light return and color saturation. The oval outline and measured proportions were selected to maximize optical performance for an intense orange body color, while retaining a depth that supports even facet reflection and prevents windowing in bright light.

At the material level, fire opal is an amorphous hydrated silica, with a refractive index typically in the range of 1.44 to 1.46 and a relatively low dispersion compared with crystalline gemstones. Unlike precious opal where ordered silica spheres diffract light to create play of color, the radiance of this flame opal is derived primarily from its body color and transparency. In transparent specimens such as this one, the gem behaves more like a colored, transparent material where internal reflection, facet junction geometry, and surface polish govern brilliance. The mixed brilliant cut employed here leverages the intrinsic transparency to generate scintillation and lively flashes, by creating multiple small, precisely angled crown facets that break the light into defined reflections, and a pavilion geometry that controls internal return paths. The resulting sparkle is therefore not dependent on opal sphere structure, but on meticulous facet design tuned to the opal refractive index and the strong orange chroma.

From a cutting and facet engineering perspective, the cutter has deployed a mixed brilliant scheme to balance two optical priorities, intensity of body color and scintillation. The crown exhibits a traditional brilliant facet array, intended to fragment incoming light into small, high contrast flashes that enhance perceived sparkle even when play of color is absent. The pavilion uses a calibrated set of facets that act as efficient return planes, minimizing light leakage while preserving back illumination that deepens the orange tone. With an effective depth of approximately 4.16 millimeters relative to the mean girdle diameter of about 6.695 millimeters, the stone presents a depth of roughly 62.2 percent, a proportion that sits within an optimal range for ovals to ensure ample light return without excessive darkness at the center. Facet junctions are tightly met, and the excellent polish reduces micro facet diffusion, producing crisp facet boundaries that increase specular highlights. The very slightly included clarity grade indicates minimal internal blemishes that do not interrupt the primary light paths, allowing the mixed facet architecture to operate at near optimal efficiency.

Craftsmanship and provenance further amplify the technical merits of this flame opal. Originating from Mexico and supplied by The Natural Gemstone Company, the gem is presented in its natural state with no enhancement, which preserves the raw balance between body color and optical behavior. The cutter calibrated crown and pavilion angles to the material refractive properties and to the vivid color intensity, a technique that requires iterative preforming and precise polishing to avoid overheating and to maintain stability in an inherently hydrated amorphous matrix. For setting and use, a protective mounting such as a bezel or low profile prong combination is recommended to reduce mechanical risk and to limit exposure to rapid thermal change or solvents that can affect some opals. For the technically minded buyer, this fire opal offers a compelling combination of intrinsic material properties, deliberate facet engineering, and careful finishing, yielding a sparkle and presence that is distinct within the opal family, and a confident addition to any collection seeking a vivid orange transparent stone.