69.61 Ct. Greenish Blue Cabochon Aquamarine from Brazil

This specimen is a translucent, cushion shape aquamarine weighing 69.61 carats, with dimensions 25.80 x 22.50 x 11.90 mm, presented in a traditional cabochon cutting style. The cutting exhibits a domed crown with a proportionally deep pavilion that yields a pronounced profile, and the cabochon face has been polished to an excellent finish for optimal light transmission and surface appeal. Color is best described as greenish blue with medium color intensity, showing balanced saturation when viewed face up under white light, and the stone displays an even color distribution with minimal zoning. Clarity is graded slightly included at eye level, meaning that inclusions are present but do not overly distract from the overall visual effect, they appear as internal features that interact with the translucent material rather than as opaque interruptions. The piece has been heat treated, a common and stable enhancement for aquamarine that improves tone and reduces green undertones without compromising structural integrity when set under standard jewelry fabrication temperatures. Origin is Brazil, a source known for producing aquamarines with soft, ocean inspired hues and consistent material quality.

From a design and fabrication perspective this aquamarine is exceptionally well suited for custom jewelry projects because its size and cushion cabochon form provide a versatile canvas for a wide range of settings. The large plano base and 11.90 mm depth permit secure bezel seats, recessed galleries, and integrated mountings, enabling jewelers to create low profile rings with wide shanks, substantial pendants with hidden bails, or brooches and cufflinks that emphasize face up color. The cabochon dome favors bezel or rubover mounting methods, which protect the edge and crown from abrasion while presenting a continuous uninterrupted surface that highlights the stone color and polish. For ring applications, recommend a broad shank and internal shank reinforcement to reduce torque on the finger and to stabilize the mass, and consider a slightly raised or tapered bezel to accommodate the dome and to protect the shoulders in everyday wear. For pendant settings, a substantial bail or fixed cap can distribute weight and prevent rotation, while bezel mountings allow direct attachment to custom motifs using soldered seats or screw set retention if a removable mount is desired.

Technical considerations for lapidary adjustments and jewelry fabrication include maximization of the greenish blue tone through orientation and light management, and strategic placement of inclusions to enhance rather than detract from the composition. Because the stone is translucent rather than fully transparent, internal features can add depth and character when positioned beneath areas intended to catch light, so setting designs that allow controlled light exposure from the sides or back will enhance visual depth. The cabochon profile and excellent polish make the surface ideal for high contrast metalwork, such as matte bezels or micro milgrain edges that frame the dome without competing with its breadth. Heat treatment is stable, but take standard precautions during manufacturing, such as minimizing direct flame contact near the stone and avoiding prolonged exposure to annealing temperatures above normal solder cycles, to preserve the treated state. Metal recommendations that complement the greenish blue hue and provide structural integrity include 18 karat gold in warm tones for contrast, platinum for maximum durability, and sterling silver for cost effective design studies.

The Natural Gemstone Company stands behind the documented origin and disclosed treatment on this specimen, and we provide detailed imagery, measured proportions, and consultation to assist in custom design decisions. For jewelers and private clients seeking CAD mockups or tailored mounting specifications we can supply orientation views, facetless dome profiles, and tolerance allowances to streamline fabrication and ensure seat accuracy. This aquamarine is particularly compelling for statement pieces where size and shape are primary design drivers, and it offers a rare opportunity to work with a substantial cabochon that balances visual impact with practical setting options. Please contact The Natural Gemstone Company for additional technical data, high resolution images, and to discuss bespoke mounting strategies or commissioned designs.