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This aquamarine is a transparent, round shape gem weighing 12.88 carats, with precise dimensions of 16.40 by 16.40 by 8.84 millimeters. The stone has been fashioned in a mixed brilliant cut, combining facet structures to balance scintillation and face up size, and it exhibits an excellent polish across all facet junctions. Color is a greenish blue with light intensity, offering a delicate and fresh appearance that remains clearly evident in natural and artificial lighting. Clarity is graded as eye clean, evaluated at eye level, indicating an absence of inclusions visible to the unaided eye and delivering an uninterrupted visual field through the table. Enhancement status is none, the gem is unheated and otherwise untreated, and the documented origin is Ceylon, Sri Lanka, a source noted for producing aquamarines with fine crystalline clarity.

The proportions of this specimen support a pleasing face up presentation, with a depth of 8.84 millimeters relative to the 16.40 millimeter diameter, approximately 54 percent depth, which contributes to both light return and apparent size. The mixed brilliant cut creates a combination of larger faceted planes and smaller pavilion facets, yielding controlled dispersion and a lively play of light without excessive flash. The excellent polish further refines light performance, enhancing both brightness and scintillation. The greenish blue hue lies on the cooler side of the aquamarine spectrum, while the light intensity provides a versatile and wearable tone that maintains presence without overpowering accompanying design elements. The absence of enhancement preserves natural color and structure, a characteristic valued for both aesthetic and collection purposes.

Functionally, the dimensions and weight position this aquamarine as a versatile center stone suitable for a variety of settings and styles. In more casual contexts it reads as an elegant but unobtrusive accent when set in a simple bezel or low profile prong mounting, pairing well with everyday attire and routine wear. For formal applications it performs as a distinctive focal point in solitaire rings, halo settings with fine accent diamonds, statement pendants, or as the principal gem in bespoke pieces where scale and clarity are important. Metal choices will influence the visual temperature of the gem, white metals accentuating the cooler greenish blue, yellow and rose gold introducing a contrasting warmth that can emphasize the green undertone, and platinum providing a neutral and secure setting for sustained wear. The combination of a clean appearance and balanced proportions makes it suitable for both contemporary and period inspired designs.

Care considerations and provenance are straightforward. Aquamarine has a Mohs hardness of seven and a half to eight, which offers good resistance to abrasion for regular wear, however care should be taken to avoid hard knocks and prolonged exposure to harsh chemicals or extreme temperature changes. Cleaning with mild detergent and warm water using a soft brush is appropriate, and professional inspection of any mounting is recommended to ensure secure settings for a gem of this size. The Natural Gemstone Company provides this aquamarine as a natural, untreated gem originating from Ceylon, Sri Lanka, and can supply additional high resolution imagery, exact weight and dimension verification, and documentation of origin on request. For designers and collectors seeking a transparent, well cut, eye clean aquamarine with natural color and polished finish, this stone offers a combination of optical quality and practical versatility.