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

This cushion shaped Swiss blue topaz is a transparent 5.73 carat gem with dimensions 10.08 by 10.05 by 6.50 mm, cut in a mixed brilliant style that combines a faceted brilliant crown with precision step faceting on the pavilion to maximize light return and dispersive sparkle. The pavilion depth produces a depth ratio of approximately 64.6 percent, a proportion that balances table size and pavilion angle to yield an intense blue saturation without sacrificing brightness. Clarity grade is very very slightly included, evaluated at eye level, and the stone is effectively eye clean for typical wearing distances, allowing pinpoint facet reflections to remain unimpeded by internal features. The color registers as intense Swiss blue, produced through controlled irradiation enhancement, and the surface exhibits excellent polish and tight facet junctions that speak to careful lapidary technique. Origin is Ceylon Sri Lanka, and the gem displays the crisp, oceanic hue and clean tone associated with well selected Sri Lankan topaz material.

In terms of durability this topaz is exceptionally well suited to daily wear when set with appropriate protection, because natural topaz registers a Mohs hardness of 8 which resists abrasion from common environmental contacts while preserving facet sharpness and polish over time. At the same time topaz has distinct cleavage planes, so the gem requires protection from hard, directed blows and abrupt temperature extremes, and care should be taken to avoid high heat and steam which can affect color stability in irradiated material. For daily rings and bracelets a bezel or protective halo setting is recommended to shield the girdle and corners, while fine prong settings with reinforced shoulder design are acceptable when combined with routine inspection. Cleaning is best accomplished with warm soapy water and a soft brush, avoiding ultrasonic and steam cleaning whenever the piece has been irradiated, to preserve the vibrant hue. This 5.73 carat Swiss blue cushion, offered by The Natural Gemstone Company, combines precise cutting, intense color and reliable hardness to provide an eye catching center stone for everyday jewelry, when set and cared for according to industry best practices.