8.10 Ct. Blue Aquamarine from Brazil

This transparent 8.10 carat cushion shape aquamarine measures 15.31 x 10.73 x 7.87 mm, the proportions that give it an impressive face up presence without sacrificing depth. The stone displays a medium color intensity typical of fine Brazilian material, seated in a pale to medium blue field that reads as pure and evenly distributed across the table. Clarity grade, very slightly included evaluated at eye level, indicates the inclusion scene is minimal and generally only visible under magnification or against certain light angles, preserving a clean, open appearance to the naked eye. Enhancement, no enhancement, confirms this gem is untreated, retaining its natural crystalline character, and the origin, Brazil, speaks to a source known for producing aquamarine with good hue stability and crystalline transparency. The Natural Gemstone Company provides this gem with full dimensional and weight specifications so the technical buyer can assess suitability for custom mounting and design applications.

The cutting style is a mixed brilliant cut applied to a classic cushion outline, a geometry that pairs the scintillation logic of brilliant faceting with the elegant silhouette of a cushion. The cutter employed a modified crown with a series of triangular and kite shaped star facets that transition to a relatively large table, while the pavilion uses a mix of brilliant facets and truncated facets to form a stepped lower zone, optimizing internal reflection pathways. This facet architecture reduces light leakage typically associated with shallow cushions by redirecting rays back through the crown, giving a return profile that emphasizes flashes of white light and soft spectral dispersion. Corner truncations are executed with consistent symmetry to maintain even light performance across the stone, and facet junctions show precise alignment, contributing to uniform scintillation and minimizing crumbling around facet edges that can impair polish quality.

Optically the gem exhibits strong light play because the geometric faceting is calibrated to balance brightness and contrast, the mixed brilliant configuration producing many small areas of alternating light and dark that create dynamic scintillation during movement. The medium color intensity sits in a range that allows the stone to exhibit both good saturation under daylight and pleasing paleness under warmer light, preserving versatility for both high and low contrast settings. Aquamarine owes its appeal to low dispersion, and in this example the cutter exploited geometry rather than reliance on fire to produce visual interest, the result being pronounced flash and scintillation rather than prismatic color. Pleochroism in aquamarine can be subtle, and here the cut orientation minimizes directional color shifts, delivering consistent face up tone while permitting a slight shift to greener or bluer notes when viewed from the side, an effect that enhances depth without compromising evenness. The excellent polish completes the optical package, ensuring facet surfaces are free from abrasion and minor polishing lines that would otherwise diffuse returned light.

From a design and setting perspective this 15.31 x 10.73 x 7.87 mm cushion works exceptionally well in elevated prong settings that allow maximum pavilion illumination, a configuration that takes full advantage of the mixed brilliant geometry to maximize light return. For clients seeking a more contemporary aesthetic, a low profile bezel with an open gallery can also be engineered to permit light entry to the pavilion while providing protection for the broadened corners. Given the very slightly included clarity grade evaluated at eye level, the stone offers the practical benefit of durability and ease of cleaning, and the absence of enhancement simplifies long term conservation and valuation. When specifying a mounting consider minimal metal coverage of the girdle and a secure seat that avoids excessive pressure on the corners, the recommended approach being a four or six prong design tailored to the cushion proportions. The Natural Gemstone Company stands behind the measured dimensions, cut assessment, and untreated origin, and our gemological staff can advise on exact bezel depths and prong profiles to optimize this aquamarine for any envisioned piece of jewellery.