2.75 Ct. Swiss Blue Topaz from Brazil

This listing describes one transparent Swiss blue topaz, emerald cut, weighing 2.75 carats, with dimensions 9.21 x 7.10 x 4.75 mm. The gem displays medium color intensity and an overall clean appearance, with a clarity grade reported as very slightly included evaluated at eye level. The cut is an emerald style, executed to emphasize broad step facets and parallel symmetry. The surface finish is graded excellent polish. The stone is irradiated to develop and stabilize its blue hue, and its documented origin is Brazil. These objective specifications form the basis for assessment and comparison in any professional examination or appraisal.

Optically the gem presents a clear, cool blue that reads as Swiss blue in trade terminology, with an even tone across the table and pavilion. The emerald cut produces a hall of mirrors effect, favoring broad flashes of color and a controlled return of light rather than scintillation. Compared with historically celebrated blue gems, the color character differs from the deep velvety blue of classic Kashmir sapphires, which are prized for saturated tone and subtle silk, and it contrasts with the concentrated cornflower blue associated with certain Ceylon sapphires. When set against historic aquamarines and noted pale blue gemstones, this topaz offers a distinctly crisper and more saturated blue, combined with transparency and step facet clarity that recall the precise cutting of museum quality pieces, while remaining materially distinct in refractive qualities and dispersion.

From a material and treatment standpoint, irradiated Swiss blue topaz is an established and stable market category. The irradiation treatment applied to this specimen is conventional for developing blue coloration in topaz and is stable under ordinary environmental conditions, including daylight exposure and routine wear. With a clarity grade of very slightly included evaluated at eye level, the stone carries minor internal characteristics that do not materially affect transparency or light return when mounted, and the excellent polish contributes to an even reflective plane across facet junctions. The Brazilian provenance aligns with significant modern supply sources for topaz, and the combination of origin, treatment, and cut results in consistent performance for use in fine jewelry. In comparison to famous historical gems whose value is strongly linked to rarity, provenance, and historical narrative, this Swiss blue topaz offers measurable and repeatable attributes that support practical valuation and everyday wear.

In application, a 2.75 carat emerald cut topaz with these proportions and optical properties is well suited to a variety of settings, including solitaire rings, pendants, and bespoke designs where the step cut can be showcased. Topaz registers at approximately 8 on the Mohs scale, providing good resistance to abrasion for routine use, while care should be taken with sharp impacts because of inherent cleavage planes. Cleaning with warm soapy water and a soft brush is appropriate, avoiding harsh thermal shock and strong chemicals. For designers and gemologists evaluating this specimen, the combination of size, clarity, and polish produces clean facet outlines and a pleasing table presentation that complements contemporary and classic mounting styles. The Natural Gemstone Company provides this item with the above technical description to support informed selection and accurate documentation for further gemological work or jewelry design.