6.78 Ct. Purple Amethyst from Ceylon (Sri Lanka)

This transparent purple amethyst weighs 6.78 carat, and is cut in a classic emerald cut shape with precise dimensions of 17.86 by 8.50 by 5.74 millimeters, offered by The Natural Gemstone Company. The cutting style is faceted, executed with step facets that define the emerald cut geometry. The stone presents an intense color intensity, a clarity grade described as very very slightly included evaluated at eye level, and an excellent polish. There is no enhancement of any kind, and its origin is Ceylon Sri Lanka, a source recognized for producing amethysts with strong, saturated purple tones. The combination of weight, elongated proportions, and high transparency produces a commanding visual presence, while the unenhanced natural color ensures that the chroma and hue are intrinsic to the crystal lattice rather than the result of treatment.

The optical behavior of this amethyst is a direct consequence of its emerald cut geometry and the material properties of quartz. The faceting design relies on broad parallel crown and pavilion steps, a generous rectangular table, and well proportioned corner bevels that together create a hall of mirrors effect unique to step cuts. The length to width ratio is approximately 2.10, producing an elongated silhouette that emphasizes flash and directional light travel along the long axis. The measured depth of 5.74 millimeters yields an overall depth of approximately 43.5 percent relative to the average of the length and width, a proportion that balances depth for sufficient internal reflection against an optical window that showcases the stone color. As quartz has a refractive index and dispersion lower than corundum or diamond, this amethyst does not rely on high dispersion to sparkle. Instead, the cutter has optimized facet angles and large, planar steps to maximize contrast and mirrorlike flashes, producing scintillation that reads as bold flashes of violet and blue violet rather than the fine pinpoint sparkle typical of brilliant cuts.

Craftsmanship is evident in the execution of facet junctions, symmetry, and the final polish, which all contribute to light performance and perceived brilliance. The excellent polish reduces unwanted light diffusion at facet interfaces, so that light entering the stone experiences coherent internal reflection and returns as clean, saturated color flashes. Very very slight inclusions evaluated at eye level are minimal, positioned and oriented in a way that does not interrupt the main light paths, preserving both transparency and the stone feeling visually clean. The intense purple saturation works with the emerald cut to create a layered color effect, where the step facets act as planes that trap and release color, producing alternating zones of deep and vivid purple as the viewing angle or light source changes. For jewelry design considerations, this amethyst performs exceptionally in elongated ring settings and bezel set pendants where the step facets can be read from the face and the side, and where secure settings can protect the crisply cut corners. As offered by The Natural Gemstone Company, this amethyst is a specimen for connoisseurs who value the interplay of material properties, geometry, and finishing technique, a stone whose structural decisions yield a sparkle and color delivery that stand apart from more common cuts and treatments.