0.61 Ct. Purplish Blue Spinel from Ceylon (Sri Lanka)

This gem is a transparent 0.61 carat cushion shape spinel from Ceylon Sri Lanka offered by The Natural Gemstone Company, presenting a delicate purplish blue hue with light color intensity. The proportions measure 5.43 by 4.68 by 2.57 mm, and the cutting style is faceted with a mixed brilliant cut, executed to emphasize both color and light return. Clarity is graded very very slightly included evaluated at eye level, and the surface finish carries an excellent polish. This stone is natural and untreated, no enhancement, and its combination of clarity and polish allows for clean facet windows and crisp internal reflections, attributes that are accentuated by the cutter's attention to symmetry and facet alignment.

The cushion outline has been interpreted with a modern mixed brilliant architecture, where the crown facets are arranged to create broad reflective planes that capture ambient light, while the pavilion utilizes brilliant style faceting to return light with lively scintillation. The mixed brilliant cut in this size has been optimized to strike a balance between table size and crown height, maintaining a broad table to showcase color, yet preserving sufficient crown and pavilion angles to produce contrast and sparkle. Facet junctions exhibit tight meet points, and the girdle proportions are calibrated to minimize weight loss while maintaining structural integrity for setting. The cutter prioritized pavilion depths that enhance internal return rather than excessive extinction, and crown facet angles that promote even light distribution across the table. These choices produce a harmonious pattern when viewed face up, and they reduce the visibility of the very very slight inclusions when evaluated at typical wearing distances.

Optically this spinel behaves as a singly refractive gem with high transparency and a tendency to display clean, mirror like facet reflections rather than directional color zoning. In bright daylight the purplish blue registers with a cooler bias, the blue component becoming more prominent and the violet undertone remaining perceptible, resulting in a crystalline, almost periwinkle effect that takes advantage of the stone's light color intensity. Under warm incandescent illumination the same stone reads slightly richer toward the violet side, the lower energy spectrum enhancing the purple notes and giving a softer, warmer overall appearance. Under modern LED lighting the outcome depends on LED color temperature, cool white LEDs will emphasize the blue, producing crisp, high contrast flashes from the pavilion facets, while warm white LEDs will push the color slightly toward purple, increasing perceived depth. Under focused halogen or jewelry spotlighting the mixed brilliant faceting creates strong pinpoints of white brilliance mixed with small colored flashes from dispersion, yielding an active scintillation pattern that moves with the wearer. Fluorescent office lighting may render the tone paler and more pastel, but the excellent polish preserves sharp facet boundaries so that even in lower contrast environments the stone retains a refined sheen.

For setting and daily wear considerations the gem is well suited to designs that allow light to enter from multiple angles, such as four prong or open bezel mountings, which will maximize its mixed brilliant performance and allow the crown planes to project their reflective pattern. White metals such as platinum or white gold will reinforce the cool aspects of the purplish blue, while yellow or rose gold can introduce a subtle warmth that complements the violet component if a more saturated looking appearance is preferred. Given the hardness and toughness typical of spinel, this 0.61 carat cushion is a practical candidate for rings and pendants intended for regular use, and the absence of enhancement assures that its natural color and internal structure will respond predictably to different lighting environments. At The Natural Gemstone Company we present this Ceylon spinel with full transparency regarding its cut, polish, clarity, and origin, and we are prepared to advise on custom mounting options that will highlight its optical strengths, from open gallery settings that increase light flow to halo arrangements that enhance perceived brilliance without overwhelming the gem.