0.92 Ct. Alexandrite from Brazil

This alexandrite, offered by The Natural Gemstone Company, is a rare specimen that combines near one carat weight with strong color change, transparency, and precision cutting. The stone weighs 0.92 carat and is fashioned in an oval outline with dimensions of 6.85 x 5.18 x 3.44 mm. The length to width ratio is approximately 1.32, providing a slightly elongated oval silhouette that flatters a variety of mounting styles. The cutting style is a mixed brilliant, which integrates a faceted crown designed to maximize light return with a pavilion architecture engineered for optimal color saturation and change. The polish is graded excellent, and the gem is natural with no enhancement, originating from a known alexandrite source in Brazil. These baseline metrics place this gem in a category of material that is rarely encountered in the market, especially given its combination of size, vivid color change, and eye level clarity characteristics.

Color performance is the defining attribute of this piece, and it is described with technical precision. Under fluorescent lighting tones shift toward bluish green, exhibiting cool, saturated blue green facets with secondary deep teal zones. Under incandescent lighting the stone shifts to pinkish purple, displaying a warm purple field with pink overlays and strong saturation. The color change is vivid rather than muted, indicating a pronounced differential absorption profile across the visible spectrum. This effect is characteristic of chromium activator ions in alexandrite type chrysoberyl matrices, and the observed shift from bluish green to pinkish purple is a textbook example of a high quality color change. The vivid intensity across both lighting conditions enhances face up presence, making the color change obvious even at typical jewelry viewing distances. Compared to more common alexandrites that are either smaller, have weaker change, or present brownish modifiers, this stone stands out for the clarity and purity of its transitional hues.

Clarity and cutting geometry have been executed with attention to optical performance and durability. The clarity is graded very slightly included evaluated at eye level, indicating that inclusions are minimal and do not materially interrupt light transmission or the color change effect when the gem is set in jewelry. Surface condition and facet junctions exhibit an excellent polish, which supports crisp facet reflections and contributes to overall brilliance under light. The mixed brilliant cut configuration places a well proportioned table and crown angle relationship above a pavilion with faceting optimized to manipulate internal reflection paths, promoting both scintillation and color zoning that intensifies the alexandrite effect. The depth measures 3.44 mm, which corresponds to a depth to average diameter ratio of approximately 57.2 percent, a proportion that balances face up spread with sufficient pavilion depth to deepen tone without sacrificing brilliance. These precision proportions, combined with the excellent polish and minimal inclusions, make the gem particularly suitable for fine jewelry applications that require both optical performance and structural reliability.

Rarity considerations position this Brazilian alexandrite as a collector grade offering. Alexandrite of near one carat from Brazil showing a vivid bluish green to pinkish purple change is less common than smaller stones or specimens with weaker, muddy, or brownish modifiers. Size and color purity are multiplicative factors in rarity, and the present stone’s combination of 0.92 carat weight, vivid color change, and very slightly included clarity produces a scarcity rarely seen in market inventories. The absence of enhancement further increases its value profile, because many gemstones on the market undergo diffusion, heating, or fracture filling to improve appearance. For mounting, settings that allow both overhead light and warm light access will best display the full range of the color change, and open gallery designs with minimal metal obstruction are recommended to preserve the stone’s optical dynamics. Care should follow standard chrysoberyl guidance, avoiding harsh ultrasonic cleaners in the presence of surface reaching inclusions, and using gentle household cleaning agents and soft brushes for routine maintenance. For buyers seeking a technically superior alexandrite with measurable design metrics and demonstrable color change, this gem represents a rare and practical choice. For further information or procurement, please contact The Natural Gemstone Company.