0.64 Ct. Greenish Blue Grandidierite from Madagascar

This transparent 0.64 carat cushion shape greenish blue grandidierite is a well proportioned specimen that combines measured size with refined optical performance. The stone measures 5.54 by 4.95 by 3.34 mm, presenting a compact profile that is appropriate for both collector displays and bespoke jewelry settings. The cutting style is faceted, executed in a mixed brilliant cut that balances pavilion and crown facet arrangements to enhance both color and light return. The finish is described as excellent polish, which contributes to crisp facet junctions and a lively surface luster. This grandidierite is entirely natural, with no enhancement, and its documented origin is Madagascar, a locality noted for producing some of the finest examples of this rare species.

Visually the gem exhibits a greenish blue hue with medium color intensity, a balance that allows subtle saturation without appearing overly dark. Grandidierite is known for directional color behavior, and this piece displays nuanced shifts in tone as the viewing angle changes, adding dynamic interest to the gem when it is rotated or set into jewelry. Transparency is high and the stone has been graded slightly included when evaluated at eye level. Inclusions are present but localized and do not materially obstruct the gem s overall transparency or diminish its capacity to transmit light. The mixed brilliant cut has been chosen to maximize scintillation while preserving the distinctive color characteristics of grandidierite, and the combination of proportions and polish ensures an attractive presentation under a variety of lighting conditions.

From a connoisseur s perspective this grandidierite represents a judicious balance of rarity, natural origin, and aesthetic appeal. At 0.64 carat it is an intimate size that nevertheless reads as substantive when mounted, particularly in settings that emphasize the stone s color and clarity. The measured depth of 3.34 mm in relation to the length and width yields a depth proportion that is approximately 64 percent, a proportion that supports effective light return and contributes to the gem s perceived brightness. The lack of post extraction enhancement preserves the specimen s natural character and provenance, attributes that are important to high end collectors who prioritize authenticity and traceability. Madagascar provenance further enhances the geological interest, as the island s deposits are recognized for yielding grandidierites with attractive color ranges and good crystallographic development.

Careful consideration of mounting and long term handling will ensure the stone retains its condition and value. Although grandidierite has favorable hardness relative to many collector minerals, it benefits from protective settings and thoughtful wear to minimize the risk of mechanical damage and abrasion. For collectors The Natural Gemstone Company can provide detailed imagery and condition documentation, and we can also facilitate independent gemological reporting on request to support provenance and authenticity records. In summary this 0.64 carat cushion shape greenish blue grandidierite is a distinguished acquisition for a high end gemstone collection, offering natural, untreated origin, balanced dimensions, excellent polish, and the subtle, shifting color that defines the species.