1.70 Ct. Sky Blue Topaz from Brazil

This listing presents a transparent 1.70 carat cushion shaped sky blue topaz, with dimensions 7.09 by 7.02 by 4.37 millimeters, cut in a mixed brilliant style to balance scintillation and depth, clarity graded as very slightly included, evaluated at eye level, color showing a pleasing light intensity, and an excellent polish that enhances facet contrast and face up brightness. The mixed brilliant cut combines the table and crown geometry of a brilliant with pavilion faceting that returns light with lively dispersion, making this gem appear larger and more lively than its carat weight might suggest. The cushion outline offers soft rounded corners that sit comfortably in a wide range of settings, while the excellent polish ensures crisp facet junctions and clean light paths. This topaz has been treated by irradiation to achieve its sky blue hue, a standard and widely accepted enhancement in the trade that produces stable color under normal wear conditions, and the stone originates from Brazil, a provenance noted for producing clean, attractive topaz crystals.

For the educated buyer seeking factual details that matter, this gem represents a thoughtful balance of size, cut quality, and eye level clarity. At 1.70 carats and just over seven millimeters across, the stone is large enough to serve as an impressive center stone for rings and pendants, while the cushion shape maintains classic proportions that suit both traditional and contemporary designs. The clarity grade of very slightly included indicates only minor natural features, which are not distracting at typical viewing distances, and these small inclusions are often considered part of the natural character of the gem. The light color intensity is highly desirable for sky blue topaz, conveying a fresh, airy blue that pairs well with both warm and cool metal tones. The excellent polish contributes to maximum brilliance and clean reflections, and the mixed brilliant cut enhances optical performance by creating a pleasing blend of sparkle and depth. As with most irradiated blue topaz, the color is stable under normal wearing conditions, though the educated buyer should be aware that extreme heat and harsh chemical exposure can affect treated gemstones.

This sky blue cushion topaz excels in versatility, making it an ideal choice for both casual and formal settings. In a simple bezel or solitaire mounting the gem provides effortless everyday elegance, while set within a halo or more elaborate design it contributes refined sparkle suitable for evening occasions and formal events. The stone pairs exceptionally well with white metals such as platinum and white gold, which emphasize the cool blue tone, and it also offers attractive contrast with yellow gold for a warmer, vintage inspired look. For care, avoid exposing the stone to prolonged high temperatures, harsh household chemicals, and sharp impacts, and have it inspected periodically by a professional jeweler to ensure settings remain secure. The Natural Gemstone Company is committed to transparent and accurate information, and we provide provenance details, treatment disclosures, and precise measurements so collectors and designers can make informed choices. This Brazilian sky blue topaz is a compelling option for the discerning buyer who values documented quality, versatile aesthetics, and responsible disclosure in a gem that will perform beautifully in a wide range of jewelry designs.