5.35 Ct. Topaz from Brazil

This oval shaped London blue topaz presented by The Natural Gemstone Company weighs 5.35 carats, and measures 11.86 x 9.82 x 5.92 mm. The stone is transparent, with an intense blue color that is consistent across the crown and pavilion, and its mixed brilliant cut is executed to maximize scintillation and face up color. Clarity is graded as very slightly included when evaluated at eye level, a level that yields excellent visual performance while preserving natural character. The gem displays an excellent polish, producing crisp facet junctions and lively light return, and the color is the result of controlled irradiation enhancement, a standard and stable treatment for London blue topaz. The material originates from Brazil, where the rough was sourced and prepared under industry standards, and the dimensions and proportions are suited to a range of classic and contemporary jewelry designs. The cut proportions and polished finish allow the gem to exhibit balanced dispersion and a strong degree of brilliance relative to its size, making it visually commanding in settings that allow the table to interact freely with light.

Topaz has a hardness of eight on the Mohs scale, which gives this London blue specimen substantial resistance to everyday abrasion and surface scratching, and makes it well suited for daily wear in rings, pendants, earrings, and bracelets. Despite its hardness, topaz is known to have perfect basal cleavage, which means it can split along certain crystallographic planes if subjected to sharp, concentrated impact or severe mechanical shock, particularly along thinner pavilion sections. The mixed brilliant cut used here reduces thin pavilion extremes and reinforces stable proportions, but as with all topaz it is prudent to avoid heavy impacts and lateral blows. The irradiation enhancement used to produce the London blue hue is stable under normal conditions of light exposure, and the color will remain consistent during routine wear, however the color can be affected by prolonged exposure to high heat or by aggressive laboratory treatments, so standard jeweler repairs involving significant heating should be evaluated before work proceeds. Overall the balance of hardness, polish, and cut make this gem an excellent candidate for daily jewelry when set with attention to protection and support.

Practical care and mounting recommendations will extend the life and appearance of this London blue topaz. For ring applications, a bezel or low profile secure prong setting is advised, these settings protect the girdle and pavilion and reduce the chance of direct impact to cleavage directions, for pendants and earrings the gem performs very well in open settings that allow light to pass through the crown, and for bracelets choose mounting styles that minimize contact with rough surfaces. Cleaning is best accomplished with warm water, mild detergent, and a soft brush, rinsing thoroughly and drying with a lint free cloth, avoid prolonged exposure to strong acids, alkalis, and household chemicals, and avoid sudden thermal shocks or direct flame. When any repair or resizing is contemplated, disclose the irradiation enhancement to the jeweler so appropriate precautions can be taken with heat. The Natural Gemstone Company documents the gem details including weight, dimensions, cut, clarity grade, color intensity, polish quality, enhancement method, and origin Brazil, and our assessments are performed to industry standards to assist designers and customers in making informed decisions. With prudent setting choices and routine care, this 5.35 carat London blue topaz offers durable performance and enduring beauty for daily wear.