1.42 Ct. Swiss Blue Topaz from Brazil

This Swiss blue topaz from The Natural Gemstone Company is a beautifully transparent 1.42 carat, emerald cut shape gemstone, with precise dimensions of 7.11 by 5.06 by 4.39 millimeters. The stone is faceted in a refined checkerboard pattern across the crown, while retaining the classic stepped geometry of an emerald silhouette, a combination that produces crisp facet definition and lively surface scintillation. The cutting style has been executed to exacting standards, resulting in an excellent polish that maximizes light return and produces clean, defined reflections. Clarity has been graded as very slightly included when evaluated at eye level, which means the stone appears visually clean to the unaided eye, with any internal features appearing minor and confined to areas that do not detract from its overall brilliance. Sourced from Brazil, a region known for producing large, well formed topaz crystals, this gem exhibits the sort of crystal quality and orientation that cutters favor for achieving an even, saturated hue and superior transparency.

From a gemological perspective this Swiss blue topaz offers an engaging balance of optical properties that make it attractive to the educated buyer. Topaz has a refractive index in the range of about 1.609 to 1.643, and a hardness of 8 on the Mohs scale, which provides good resistance to everyday wear, unlike softer gem materials. The checkerboard faceting enhances scintillation and gives a lively play of light across the table and crown, compensating for the modest dispersion inherent to topaz. The medium color intensity of this piece is the result of controlled irradiation, a standard enhancement for Swiss blue topaz that reliably produces vivid, stable blue tones. The irradiated treatment used to create the Swiss blue color is industry standard, and when followed by proper heat management during cutting and setting, it yields a color that remains stable under normal wear and exposure to light.

When comparing brilliance and light performance to more commonly encountered gemstones, it is helpful to consider refractive index and dispersion. Diamond, with a much higher refractive index and greater dispersion, produces more pronounced fire and sparkle. Sapphire, with its higher refractive index, will also display stronger light return in some lighting conditions. However, compared to beryl varieties such as aquamarine, topaz typically shows greater brilliance because of its higher refractive index and cleaner facet reflections. This Swiss blue topaz stands out among blue gemstones because its medium saturation and very slight inclusions allow for a bright and even body color, while the checkerboard crown delivers a dynamic surface pattern that catches and returns light with notable clarity. The result is a gemstone that reads as lively and elegant on the finger or pendant, offering a combination of color intensity and optical performance that is particularly appealing to buyers seeking a gemstone with strong presence yet excellent value relative to high end sapphires and diamonds.

For practical considerations and value assessment this topaz carries several attributes that educated buyers prioritize. The 1.42 carat weight combined with the emerald cut proportions and the 7.11 by 5.06 by 4.39 millimeter dimensions make the stone versatile for classic solitaire and halo settings, and it sits comfortably on the hand as shown in the reference images. The very slightly included clarity at eye level means minimal impact on appearance, while the excellent polish ensures sharp facet junctions and maximum light return. The irradiated enhancement is a common and accepted practice for Swiss blue topaz, and it allows collectors to acquire a vivid blue hue at a fraction of the cost of natural untreated blue gems. Because the stone originates from Brazil, buyers familiar with global sources will recognize the provenance as consistent with high quality topaz material, often characterized by good crystal size and clarity. At The Natural Gemstone Company we present this gem with full disclosure of its treatment, cut, clarity, and origin, enabling confident purchase decisions based on transparent, factual information.