47.88 ct Swiss Blue Topaz cushion cut eye clean loose gemstone

Natural Swiss Blue Topaz 47.88 ct – Cushion Cut | Eye Clean

Name: Natural Swiss Blue Topaz 47.88 ct – Cushion Cut | Eye Clean
Brand: SOSNA Gems
SKU: TPZ-0004
Price: 17796.00 CZK
Availability: InStock

17.796,00 CZK

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Description

This exceptional Swiss Blue Topaz weighs 47.88 ct and showcases a vibrant electric blue color combined with a beautifully proportioned cushion cut. Renowned for its brilliance and striking saturation, Swiss Blue Topaz remains one of the most desirable blue gemstones among collectors and jewelry enthusiasts worldwide.

Measuring 21.44 × 18.14 × 13.16 mm, this gemstone offers an impressive size and presence, making it an outstanding choice for a luxury pendant, statement ring, or bespoke jewelry design.

This specimen features Eye Clean clarity, meaning no inclusions are visible to the naked eye, allowing its vivid color and brilliance to take center stage.

Swiss Blue Topaz is admired for its refreshing ocean-blue hue and remarkable sparkle. With its substantial size, excellent clarity, and attractive cut, this gemstone presents a wonderful opportunity to create a truly unforgettable piece of jewelry.

Natural Swiss Blue Topaz 47.88 ct – Cushion Cut | Eye Clean

17.796,00 CZK

Documentation & Verification

Every gemstone is supplied with the documentation stated in the product specification. This may include an independent laboratory certificate or a Sosna Gems Colored Stone Report.

Additional or alternative independent laboratory certification can be arranged upon request for eligible gemstones.

Learn about bespoke jewelry

Every bespoke piece begins with a gemstone. Selected gemstones from our collection can be transformed into individually designed jewelry, created around the proportions, character and intended use of each stone.

Every design is developed in consultation with our gemologists and goldsmiths, ensuring that the finished piece complements both the gemstone and your preferences.

Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Topaz is a silicate mineral valued for its clarity, durability, and broad color range, which includes colorless, blue, yellow, brown, pink, and imperial hues. In gem-quality material, topaz is appreciated for its clean appearance and ability to be cut into precise, well-defined shapes that emphasize brilliance and transparency.
Chemically composed of aluminum fluorosilicate (Al₂SiO₄(F,OH)₂), topaz crystallizes in the orthorhombic crystal system and belongs to the silicate mineral group. Gem-quality specimens typically display a vitreous luster with transparent clarity.
The refractive index of topaz generally ranges from approximately 1.61 to 1.64, resulting in bright light return and a crisp visual appearance. Topaz is found in several regions worldwide, with notable sources including Brazil, Pakistan, Russia, Sri Lanka, and Nigeria, depending on the specific color variety.

Durability & suitability

With a hardness of 8 on the Mohs scale, topaz offers very good resistance to scratching, making it suitable for a wide range of jewelry applications when properly set and worn with standard care. It performs reliably in rings, pendants, earrings, and bracelets.
Despite its hardness, topaz has perfect cleavage, meaning it can be sensitive to sharp impact if struck at certain angles. For this reason, protective settings are recommended for rings, particularly for larger stones. When thoughtfully set, topaz combines durability with refined brilliance, making it suitable for both everyday jewelry and more expressive, statement-oriented designs.

Treatments & authenticity

Topaz is commonly treated to enhance or modify color, particularly in blue varieties, where irradiation followed by heat treatment is widely used and accepted within the gem trade when properly disclosed. These treatments are stable and do not compromise the structural integrity of the gemstone.
Any treatments or enhancements are always clearly stated for each individual gemstone. Every stone is professionally examined, and transparent disclosure is regarded as a fundamental part of responsible gemological practice, allowing clients to make informed and confident decisions.

Sosna Gems is not a licensed financial advisor. Gemstones are collectibles, not securities. Past performance is not indicative of future results. Legal & risk disclosure .