11.26 Ct. Blue Aquamarine from Brazil

This aquamarine is a transparent, oval shape gemstone weighing 11.26 carats, measuring 19.02 by 13.30 by 7.90 millimeters, and featuring a mixed brilliant cut. The clarity is graded very very slightly included based on an eye level evaluation, and the light blue color intensity presents as a clear, pale blue that is consistent across the table and crown. The polish is excellent, the stone shows no enhancement, and its reported origin is Brazil. Those measurements and proportions create a substantial face up area that allows the gem to display broad, soothing blue tones without the visual noise of heavy inclusions, and the images provided include hand scale references that illustrate how the gem sits as a ring center or as a pendant focal point. As supplied by The Natural Gemstone Company, this piece is notable for its combination of size, natural color, and untreated status, attributes that are increasingly uncommon in larger, eye clean beryl specimens.

Optically, aquamarine is a beryl species with optical properties that differ from more commonly referenced gemstones, and understanding those differences explains why this stone stands out. Aquamarine has a refractive index in the range of approximately 1.577 to 1.583, and a modest dispersion, so it will not show the high level of fire that a diamond exhibits. Diamond has a significantly higher refractive index and dispersion, and as a result diamonds present more intense scintillation and colorful fire. Corundum species such as sapphire have a higher refractive index than aquamarine and can show stronger contrast and brilliance under similar cuts. Emeralds often carry heavier inclusions that diffuse light and reduce sharp brilliance. What distinguishes this aquamarine is the mixed brilliant cut that combines the advantages of a faceting design meant to maximize both light return and color saturation. The crown faceting produces lively scintillation across broad flashes, while the pavilion design helps channel light back through the table and crown to emphasize clarity and tone. Because the stone is light in tone and effectively eye clean, it reads as a clear, watery gem with crisp facet junctions and broad internal reflections rather than the small pinpoint sparkle typical of higher dispersion gems. The excellent polish plays a critical role in maintaining strong light return, and the absence of enhancement means the observed balance of hue and brilliance is natural to the material.

From a practical and design perspective this aquamarine is well suited to a variety of mounting styles because of its size and cutting style. The substantial 11.26 carat weight and oval outline lend themselves to an elegant solitaire mounting with modest accent stones, a halo setting when additional brilliance is desired, or a classic three stone composition where the blue center can remain the primary visual element. Metals in white or yellow gold both complement the pale blue, with white metals tending to emphasize a cool, contemporary presentation and yellow metals creating a warmer contrast that can deepen perceived color. In terms of wearability beryl has reasonable hardness and durability for everyday jewelry with normal care, and the excellent polish and eye level clarity contribute to a stone that will display its optical qualities with minimal maintenance. For customers and designers seeking a sizeable, naturally colored, and untreated aquamarine with refined optical performance, this specimen from Brazil combines a generous carat weight, precise mixed brilliant cutting, and clean presentation, attributes that make it an excellent choice when a bright, serene blue focal stone is desired. For further information or to discuss suitability for a particular setting, please contact The Natural Gemstone Company.