5.35 Ct. London Blue Topaz from Brazil

One transparent oval shaped London blue topaz weighing 5.35 carat and measuring 11.86 x 9.82 x 5.92 mm is presented here with specifications that support clear evaluation and practical integration into finished jewelry. The stone is cut in a mixed brilliant style, a choice that balances a faceted crown configuration for optimal scintillation with a structured pavilion for consistent light return, resulting in crisp facet definition and strong face up brilliance. The clarity is graded as very slightly included, evaluated at eye level, indicating only minor internal characteristics that do not materially detract from transparency or visual performance when viewed without magnification. The color is described as intense in saturation, a desirable attribute for London blue topaz that enhances depth and visual presence, and the polish is excellent, ensuring smooth facet junctions and maximum luster. This specimen originates from Brazil and has received an irradiation enhancement to achieve its deep blue tone, a standard and stable treatment widely accepted in the trade when disclosed.

Durability characteristics are central to assessing suitability for daily wear, and this topaz combines favorable hardness with structural considerations that inform handling and setting choices. On the Mohs scale topaz rates at approximately 8, which provides good resistance to everyday abrasion and scratching when compared with softer gem materials, making it generally appropriate for rings pendants and earrings intended for frequent wear. At the same time topaz exhibits perfect basal cleavage and may be susceptible to cleavage or chipping if subjected to a sharp blow or a severe impact, therefore protective design features and sensible care practices are recommended. The irradiation treatment used to produce the London blue color is stable under normal wearing conditions, however prolonged exposure to high temperature or aggressive chemical agents may affect color or surface finish, so avoidance of direct heat sources and household chemicals is prudent. Recommended cleaning methods include warm water with a mild soap and a soft brush, rinsing thoroughly and drying with a soft lint free cloth, and routine professional inspection of the setting and girdle for chips or wear. Steam cleaning and high temperature and ultrasonic cleaning can be used with caution, and are best avoided if the stone shows any internal fractures or if the setting limits access for safe cleaning, therefore consult a qualified jeweler prior to employing such methods.

When integrated into designed jewelry this London blue topaz offers a balance of size color clarity and finish that suits a variety of settings while benefiting from considered protective treatment to maximize longevity. For rings and bracelets where exposure to knocks is more likely, low profile bezel settings or protective halo and partial bezel designs will reduce the chance of edge contact while preserving visible table area and light performance, whereas pendants and earrings may take advantage of the stone weight and intense hue to create impactful pieces with lower risk of mechanical damage. The excellent polish and mixed brilliant cut contribute to stable and attractive face up appeal in both natural and artificial lighting, and the measured dimensions of 11.86 x 9.82 x 5.92 mm make this gem suitable for traditional oval mounting sizes while offering sufficient depth for secure bezel or prong engagement. The Natural Gemstone Company provides documentation of the gem attributes as stated here including weight dimensions cut clarity color enhancement and origin, and encourages consultation on setting and care options to ensure that this 5.35 carat London blue topaz performs reliably as a daily wear piece when incorporated into thoughtfully designed jewelry.