5.69 Ct. Blue Aquamarine from Brazil

This listing describes one transparent blue aquamarine, weight 5.69 carats, emerald cut faceted shape, with precise dimensions 13.59 by 10.78 by 6.20 millimeters. The stone exhibits a medium color intensity, a cool to slightly watery blue characteristic of fine Brazilian material, and is noted as unenhanced, preserving its natural color and structure. Clarity is described as very very slightly included, evaluated at eye level, which indicates minimal internal features that do not detract from the gem's overall transparency or light transmission. The cutting style emphasizes clean, straight step facets, and the polish is excellent, delivering crisp facet junctions and a glassy surface finish. This aquamarine is suitable for collectors and designers seeking a natural, untreated example of Brazilian aquamarine, and is presented by The Natural Gemstone Company.

The emerald cut form and faceting pattern yield distinctive optical behavior, with a broad table and long step facets that create a hall of mirrors effect, emphasizing tone and clarity over scintillation. With its excellent polish, the pavilion and crown facets produce even light return and defined facet contrast, allowing the medium blue color to read consistently face up. The stone measures slightly more than 13 millimeters across the length, which provides substantial presence in a ring or pendant without overwhelming the setting. Depth at 6.20 millimeters balances face up spread with stability in the setting, and the rectangular proportions maintain classical symmetry. Minimal eye visible inclusions permit clean facet reflection and a serene, watery appearance when viewed in direct and diffuse light, and the lack of enhancement supports long term stability in color under normal wear conditions.

When planning custom mounting choices, consider prong settings that preserve the polished step facets and the large table, prong styles that secure the corners of the emerald cut will protect the stone from impacts while allowing maximum light access. A low bezel can provide a contemporary silhouette and added protection, while a traditional four corner prong or V prong approach will maintain the geometric outline and emphasize the architectural nature of the emerald cut. Metal selection will influence the perceived color intensity, white metals such as platinum or 18 karat white gold will present the blue as cool and crisp, while yellow or rose gold will introduce a subtle warmth that can deepen the stone visually. For rings, a setting that supports the girdle and corners, combined with a well fitted head and guard rails or gallery, will ensure durability and maintain the stone geometry during regular wear.

For complementary gemstones, design strategies can either reinforce the cool blue character or introduce contrast for visual interest. Colorless brilliant cut diamonds surrounding the aquamarine as a halo will increase perceived brightness and create a luminous frame without competing with the central color. Paired side stones in tapered baguette diamonds will echo the step facets of the emerald cut and extend the rectangular axis for an elegant three stone composition. Deep blue sapphires placed as accent stones will create tonal depth and a rich contrast, bringing out the medium blue of the aquamarine. For a contrasting warm palette, small morganite accents set in rose gold will provide a soft peach counterpoint that highlights the aquamarine through complementary contrast. Green gemstones such as tsavorite garnet can introduce a fresh, lively contrast that reads as cool yet vibrant. Consider size relationships for balance, using melee to three millimeter accents for pavé shoulders, and one to four millimeter side stones for bespoke designs, ensuring the aquamarine remains the focal point while surrounding gems contribute to harmony and proportion.