1.69 Ct. Bluish Green Topaz from Brazil

This item is a transparent bluish green topaz, weighing 1.69 carat, presented in a cushion shape with precise dimensions of 7.86 by 5.96 by 4.67 millimeters. The gem features a mixed brilliant cut designed to balance scintillation and color saturation across the pavilion and crown, and it is finished with an excellent polish that emphasizes facet crispness and light return. Clarity is graded as very slightly included, evaluated at eye level, with inclusions that do not materially affect the visual performance of the stone under normal viewing conditions. Color intensity is vivid, yielding a saturated bluish green tone that remains stable in appearance across multiple viewing angles. The topaz originates from Brazil, and it has been enhanced by irradiation, an industry standard treatment used to induce or deepen blue and green hues in topaz. The Natural Gemstone Company accurately reports the enhancement and origin information for this piece, and the documentation accompanying the gem reflects these attributes.

The geological history of this topaz extends back millions of years, within a granitic and pegmatitic setting typical of Brazilian deposits. During the late stages of magma crystallization, residual, volatile rich fluids concentrated fluorine, aluminum, and silica together with trace elements in pockets and fractures of the host rock. As these hydrothermal fluids cooled and pressure conditions evolved, conditions favored the nucleation and growth of topaz crystals within cavities and along vein walls. Crystal growth proceeded slowly, allowing well defined crystal faces to develop and resulting in material with good clarity. Over geological time the host rock underwent uplift and erosion, exposing the mineralized zones where individual crystals could be recovered. The characteristic bluish green color of this specimen is a result of post formation treatment by controlled irradiation, which modifies color centers within the crystal lattice to produce the vivid hue observed. This enhancement does not recreate the original growth environment, but it is a stable and widely accepted method to achieve durable color enhancements in topaz.

From a gemological and practical perspective this topaz combines structural durability with refined optical properties. Topaz ranks high on the Mohs hardness scale, providing everyday wearability when set in well designed jewelry. The mixed brilliant cut of this cushion shaped stone was selected to optimize the interaction between internal color zoning and facet reflections, producing even color distribution and lively return of light without overstating scintillation. The very slightly included clarity grade, determined under standard gemological viewing, indicates minimal internal features that are consistent with natural crystallization and extraction processes in pegmatitic environments. The irradiated enhancement is disclosed and stable under normal conditions, and standard care guidelines apply, including avoiding prolonged exposure to strong chemicals and high heat that could affect settings or mounting materials, although the induced color itself is not expected to fade with routine wear. The Natural Gemstone Company stands behind the descriptive and technical information provided for this topaz, and the gem is supplied with documentation that records its weight, dimensions, cut type, clarity assessment, color intensity, enhancement status, and origin.