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

This cushion shape Swiss blue topaz offered by The Natural Gemstone Company is a precisely executed example of lapidary discipline, weighing 5.73 carats and measuring 10.08 by 10.05 by 6.50 millimeters. The mixed brilliant cut configuration pairs a faceted brilliant crown with a more geometric pavilion faceting scheme, engineered to balance intense color return with lively scintillation. Proportions are accurate, the depth at 64.6 percent provides an optimal tradeoff between face up presence and light return, and the near square outline with symmetrical facet junctions confirms careful preform planning and cutting control. The intense color intensity manifests as saturated Swiss blue, enhanced by irradiation in a controlled process that is industry standard and stable under normal wear. Clarity is graded very very slightly included evaluated at eye level, indicating minimal pinpoints and feathering that do not interfere with light transmission, while the excellent polish minimizes surface scattering and maximizes face up brilliance.

From a durability perspective this topaz is well suited to many daily wear jewelry applications when mounted with appropriate design considerations. Topaz has a Mohs hardness of eight, which confers strong resistance to surface abrasion and helps preserve the high polish and facet crispness during routine use. The material does possess a distinct basal cleavage that requires protection from sharp impacts and high localized stress, therefore settings that protect the girdle and pavilion such as bezels, partial bezels, or secure multi prong settings with reduced exposure at the corners will significantly reduce risk. The irradiated color enhancement is stable to light and general environmental exposure, though prolonged high heat or sudden thermal shocks should be avoided to maintain color integrity. Routine inspection of the mounting and professional cleaning with mild detergents will preserve both the gem and the setting. Taken together the cutting geometry, excellent polish, eye level clarity, and the robust hardness make this 5.73 carat cushion Swiss blue topaz an attractive and practical choice for daily wear, provided standard precautions are observed to protect the stone from direct blows and excessive heat.