7.66 Ct. Swiss Blue Topaz from Ceylon (Sri Lanka)

This transparent Swiss blue topaz, precisely measured at 13.84 x 9.94 x 6.43 mm and weighing 7.66 carats, presents a classic emerald cut that emphasizes linear geometry and controlled light return. The stone exhibits medium color intensity, producing a clear, cool blue characteristic of Swiss blue topaz, with coloration resulting from irradiation, a recognized enhancement in the trade. Clarity is graded as very slightly included when evaluated at eye level, a grade that is particularly appropriate for step cuts since the broad facets of an emerald cut reveal internal characteristics more readily than brilliant cuts. The cutting proportions and excellent polish deliver broad, parallel flashes of light and well-defined facet junctions, providing an orderly, luminous appearance rather than scintillation typical of faceted brilliants. Origin is documented as Ceylon, Sri Lanka, a source known for producing clean and well-crystallized topaz material.

In practical jewelry applications this topaz’s hue and cut combine to create a stone that commands visual attention while remaining versatile. The medium intensity Swiss blue reads distinctly against palladium, platinum, and white gold, where the cool tones are reinforced, and it provides a complementary contrast with yellow gold, where the blue appears warmer by comparison. The elongated emerald silhouette is compatible with solitaire settings that emphasize the gem’s table and step facets, as well as three-stone and halo configurations that juxtapose the topaz’s broad flashes with smaller accent stones. Because the emerald cut accentuates clarity, the very slightly included grade ensures minimal visible disruption to the clean, architectural light pattern, allowing the color to remain the principal visual attribute. As noted in our handling and disclosure practices at The Natural Gemstone Company, the topaz has been irradiated to achieve or enhance the blue hue, an industry-standard treatment for this material that is stable under normal wear conditions. The combination of size, cut, clarity, and polish makes this Swiss blue topaz suitable for design proposals where a precise, cool blue focal point is required, and where controlled light performance and geometric elegance are priorities.