10.56 Ct. Yellowish Orange Citrine from Brazil

This transparent cushion shape citrine weighs 10.56 carat, and measures 14.17 x 12.94 x 9.00 mm, presenting a substantial and well proportioned face up presence that balances spread and depth, and it is offered by The Natural Gemstone Company. The gem displays a yellowish orange hue with intense color intensity, and it has been heat treated, which is the standard enhancement for citrine to stabilize and saturate warm tones, a treatment that is permanent under normal wear. The cut is a mixed brilliant, combining a faceted brilliant crown with a complementary pavilion design, and the clarity is graded as eye clean at typical viewing distance, meaning there are no inclusions that detract from the visual performance of the stone to the unaided eye. The polish is excellent, giving crisp facet junctions and an even luster across the table and facets, and the origin is Brazil, a source known for producing uniformly colored quartz varieties with warm golden to orange tones.

From a faceting and proportion perspective, the mixed brilliant configuration of this cushion emphasizes both luminous return and depth of color, the brilliant style crown produces numerous small star and kite facets that break incoming light into a lively pattern of scintillation, while the pavilion facets are organized to deliver controlled light return and to accentuate the central color saturation. The measured 9.00 mm depth equates to a depth percentage of approximately 66.4 percent relative to the average diameter, a proportion that preserves face up spread while allowing the pavilion architecture to contribute to an appealing window free appearance, and the slightly deeper pavilion planes help concentrate the yellowish orange tone toward the center without creating a dark core. Excellent polish and precise facet alignment maximize internal reflections, and the facet junctions are tight which optimizes contrast and minimizes light leakage through the girdle area.

Optical performance is informed both by the cut and by the intrinsic properties of citrine, with a refractive index that typically falls in the range of 1.544 to 1.553, and a dispersion of approximately 0.014 which means that citrine produces modest fire relative to higher dispersion gems, but compensates with strong brightness from facet polish and effective facet geometry. Citrine shows minimal pleochroism, so the yellowish orange color remains consistent when the stone is rotated, and the heat treatment is stable so the hue will not fade under normal light exposure. The eye clean clarity grade ensures that light paths are largely unobstructed, permitting crisp internal reflections and sharp facet flashes, and the mixed brilliant design yields a mix of large and small facet reflections that enhance scintillation, delivering both broad flashes and pinfire sparkle depending on the viewing angle.

Under different lighting conditions the stone presents a predictable and attractive range of appearances, in north daylight or high CRI daylight sources the color reads as a balanced, intense yellowish orange with excellent brightness, the high color saturation looks most natural and the scintillation is lively but not harsh. Under warm incandescent lighting or warm temperature LED sources the citrine will take on stronger orange warmth, the longer wavelength light emphasizes the orange component of the hue, and the gem will appear deeper and richer while maintaining good sparkle from the polished facets. Under cool white LED or fluorescent light sources the stone may lean slightly more yellow, and the mixed brilliant facets will produce sharper pinfire flashes due to the higher color temperature of the illumination, while under spotlight or directional lighting the contrast pattern becomes more dramatic, with bright table and crown flashes interspersed with darker facet windows that emphasize depth and create dynamic movement. In low ambient light or candlelight the overall color will read warmer and more subdued, while the faceted surfaces will still give intermittent flashes of brilliance and scintillation as the light source or the viewer moves.

For mounting and wear considerations, a prong or open gallery setting will maximize light entry and preserve the lively face up performance of this cushion mixed brilliant citrine, while a closed back or deep bezel will slightly mute light return and color brightness. The excellent polish and eye clean clarity make the stone well suited for a center piece in rings, pendants, or statement earrings, and the roughly 66.4 percent depth supports secure settings without an overly tall profile. Care is standard for quartz, the gem has a Mohs hardness of seven so it resists everyday wear fairly well, avoid harsh chemicals and high heat beyond normal environmental conditions, and routine cleaning with warm soapy water and a soft brush will maintain luster, ultrasonic cleaning is generally acceptable but should be used with caution if the setting or any surface treatments are of concern. This 10.56 carat Brazilian citrine represents a technically well executed mixed brilliant cut, intense and even yellowish orange color, excellent polish, and reliable heat treatment provenance, a fine example of the quality and craftsmanship that The Natural Gemstone Company presents to collectors and designers who value measured gemological attributes and superior light performance.