1.63 Ct. Sky Blue Topaz from Brazil

One beautiful transparent 1.63 carat oval shape sky blue topaz is presented by The Natural Gemstone Company, with dimensions of 8.13 by 6.13 by 4.49 millimeters, a mixed brilliant cut, and an eye level clarity grade described as very very slightly included. This gem displays a medium color intensity that reads as a pure, cool sky blue, a hue that is highly desirable for blue topaz and well suited to both classic and contemporary jewelry designs. Originating from Brazil, a source renowned for producing topaz material with excellent clarity and color potential, this stone has been enhanced by irradiation to achieve its vivid blue tone, an industry standard treatment that is stable under normal wear, when properly cared for. The cutting and polishing work on this piece has been carried out to an excellent polish standard, producing crisp facet junctions and a smooth girdle that together allow the inherent transparency and color of the crystal to be showcased with maximum effect.

The mixed brilliant cut geometry of this oval topaz is specifically arranged to optimize light performance, combining a well proportioned brilliant style crown with a precisely faceted pavilion that promotes strong internal reflection and lively scintillation. Facets on the crown intercept incoming light, breaking it into sparkling flashes, while the pavilion facets are angled to return that light through the table rather than allowing it to escape, a balance that enhances perceived brightness and visual depth. Because topaz has a relatively high refractive index compared with many common gem materials, the careful calibration of crown and pavilion angles in a mixed brilliant cut is crucial to avoid light leakage and to enhance contrast and fire where dispersion allows. The result is a gem that appears energetic and alive as it moves, with a clean window through the table to view the stone body color, and a play of light across the elongated oval outline that flatters many mounting styles. The very very slightly included clarity at eye level means that to a viewer the stone will read as visually clean, and the absence of prominent internal features improves the uniformity of light return, making the faceting geometry more effective at producing even brilliance across the surface.

For the educated buyer, value in this topaz derives from a combination of measurable attributes, documented origin, and transparent treatment disclosure, all of which we at The Natural Gemstone Company certify and stand behind. The one point six three carat weight is a meaningful size for an oval topaz, offering substantial presence in a ring or pendant while retaining proportions that are comfortable for daily wear, supported by topaz hardness on the Mohs scale which confers durable serviceability. The medium color intensity is often preferred by collectors and designers, because it balances saturation and lightness to retain sparkle without appearing overly dark, and because it responds well to faceting styles that maximize optical performance. Irradiation is a common and accepted treatment for blue topaz, and when documented it does not detract from value in the way undisclosed treatments might, particularly when the cutting quality and polish are excellent as they are on this specimen. We recommend routine care that preserves the color and polish, including cleaning with warm soapy water and a soft brush, avoiding exposure to high heat and harsh chemicals that may alter color stability, and consulting a qualified jeweler for secure setting and occasional inspection. This oval sky blue topaz from Brazil combines clarity, color, cut, and confirmed enhancement in a way that offers both aesthetic pleasure and market transparency, qualities that appeal to discerning buyers who value informed purchasing and long term enjoyment.