1.68 Ct. Blue Aquamarine from Madagascar

This listing describes a single, transparent aquamarine weighing 1.68 carats, cut into a classic oval shape with finished dimensions of 11.86 x 6.15 x 3.93 millimeters. The cutting style is faceted, executed in a mixed brilliant cut that combines a brilliant style crown with a step or modified pavilion to balance sparkle and color. Clarity is graded as slightly included when evaluated at eye level, which means small natural inclusions are present but do not detract from overall transparency or light performance. Color intensity is light blue, characteristic of many fine aquamarines, and the stone exhibits an excellent polish that enhances surface luster and optical return. The aquamarine has been heat treated, a stable and widely accepted enhancement for this species, and the origin is Madagascar, a source known for producing clean, well colored beryl. All treatment and origin information is disclosed in accordance with our standard practices at The Natural Gemstone Company.

Under natural daylight, particularly diffuse northern light, the stone presents its truest hue, a pale to light blue that appears evenly distributed across the oval table. The mixed brilliant cut optimizes light return from the crown facets, producing consistent brilliance without excessive contrast. In direct sunlight the gem exhibits stronger scintillation, as the smaller brilliant facets catch and reflect pinpoints of light, creating noticeable flashes as the stone moves. The light color intensity means that strong daylight can wash the hue slightly, while still maintaining clarity and sparkle because of the high transparency and excellent polish. Under warm incandescent light the blue takes on a softer, slightly greener cast, a subtle shift that is expected given the weak pleochroic tendencies of aquamarine. This setting makes the gem feel warmer and more subdued, with increased depth perceived through the pavilion.

In cooler artificial lighting, such as white LED or bright fluorescent, the stone shows crisp facet definition and a slightly cooler blue tone. The mixed brilliant cut preserves contrast under these light sources, ensuring both strong table brightness and lively side flashes. In low ambient light or candlelight the overall sparkle reduces, but the stone retains a gentle bluish glow, and the highly polished facets continue to return highlights, allowing the gem to be appreciated even in softer illumination. The slightly included clarity means that inclusions may become more or less visible depending on viewing angle and lighting, but they do not significantly interrupt light flow or scintillation under typical wearing conditions. The balance of cut, polish, and clarity yields an overall performance that reads as lively in movement and serene when stationary.

For practical use and long term enjoyment, the proportions and finish of this aquamarine make it suitable for a variety of settings, including rings, pendants, and earrings, where the oval shape and dimensions will sit comfortably. To maximize brilliance, an open back or minimally obstructive mounting is recommended so that light can enter the pavilion and be reflected back through the crown. Heat treatment in aquamarine is stable and permanent, and routine care involves avoiding prolonged exposure to harsh chemicals and sudden temperature extremes, while regular cleaning can be accomplished with mild soap, warm water, and a soft brush. As presented by The Natural Gemstone Company this aquamarine is accompanied by full disclosure of its treatments and origin, and by our commitment to accurate description and quality grading.