21.42 Ct. Blue Topaz from Ceylon (Sri Lanka)

This exceptional transparent 21.42 carat blue topaz, expertly fashioned in an emerald cut, measures 18.24 x 13.33 x 8.65 mm, presenting a commanding table and crisp step facets that emphasize clarity and color. The gem carries a clarity grade of very very slightly included, evaluated at eye level, and an excellent polish that allows light to travel cleanly through the stone, producing a bright, serene blue with a light color intensity. Originating from Ceylon, Sri Lanka, this topaz has been enhanced by irradiation, a stable and widely accepted treatment in the trade that produces a permanent blue hue when properly disclosed. From a gemological standpoint, topaz has a refractive index range near 1.609 to 1.643 and a hardness of 8 on the Mohs scale, characteristics that contribute to the stone durability and suitability for a variety of jewelry settings. Chemically, topaz is an aluminum silicate with fluorine, and this particular specimen exhibits the transparent clarity and excellent facet symmetry that experienced buyers look for when assessing table size, pavilion depth, and overall optical performance.

For the conscious collector who values traceability and ethical sourcing, this blue topaz embodies both beauty and responsible procurement. The Natural Gemstone Company sources stones with documented origins, and this gem comes with full disclosure of its Sri Lankan origin and its irradiated enhancement, enabling informed purchasing decisions. Sourcing practices focus on verified supply chains, partnerships with local miners and cutters, and supporting community level benefits where possible, providing the kind of provenance an educated buyer requires. The emerald cut enhances economy of weight while showcasing clarity, making this 21.42 carat stone an ideal centerpiece for a bespoke ring, pendant, or heirloom brooch, offering both visual impact and everyday durability. For collectors who prioritize long term value, the combination of substantial carat weight, excellent polish, transparent clarity, and disclosed, stable treatment makes this topaz a reliable acquisition. The Natural Gemstone Company stands behind the stone with documentation and ethical transparency, inviting buyers to request additional grading information and origin paperwork, ensuring this blue topaz integrates seamlessly into a conscious, curated collection.