5.09 Ct. Swiss Blue Topaz from Ceylon (Sri Lanka)

One transparent 5.09 carat cushion shape Swiss blue topaz, dimensions 10.11 by 10.11 by 6.62 millimeters, mixed brilliant cut, clarity grade eye clean at eye level, intense color intensity, excellent polish, irradiation enhancement, origin Ceylon Sri Lanka. The cushion outline and mixed brilliant facet arrangement yield broad flashes of blue across the table and pavilion, while the generous depth and precise polish preserve strong return of light. The stone presents an even, vivid blue that displays well under both natural and artificial lighting, and the eye clean clarity allows for uninterrupted brilliance in solitaire and accented designs. The combination of a well centered table, thoughtful facet symmetry, and a polished girdle creates a balanced profile that is equally suitable for classic and modern mounting styles.

This topaz adapts readily to a wide range of custom jewelry settings, and The Natural Gemstone Company can provide guidance on optimal designs and measurements for secure, aesthetic mounting. For rings a four or six prong head will showcase the pavilion brilliance while minimizing metal coverage, a low bezel with an open back will protect the girdle and emphasize color, and a halo of small diamonds or white topaz can amplify perceived size and sparkle. For pendants and earrings a three prong or closed bezel with an open gallery will permit light entry and safe wear, and for cufflinks or brooches a low profile setting will sit comfortably while highlighting the 6.62 millimeter depth. The gem pairs well with white gold, platinum, yellow gold, and rose gold, each metal lending a different accent to the Swiss blue tone. When commissioning a custom piece consider mounting tolerance for the 10.11 millimeter table diameter and the pavilion height, allowance for secure prong length, and avoidance of high heat during subsequent work due to irradiation treatment. Our recommendations include routine care instructions, suggested accent combinations, and diagrams for setting seat depth, and The Natural Gemstone Company will provide exact specifications to assist your jeweler or design team in achieving an enduring, elegant finished piece.