Natural Swiss Blue Topaz – 7.04 ct – ALGT Certified Offered is a beautiful natural Swiss Blue Topaz with an attractive vivid blue colour and excellent brilliance. The gemstone has been fashioned in an elegant oval mixed cut that displays bright reflections and impressive sparkle. This gemstone is accompanied by an ALGT (Antwerp Laboratory for Gemstone Testing) certificate, confirming it as Natural Topaz with the trade colour designation Swiss Blue and a Fine Colour Quality grade. Swiss Blue Topaz is highly appreciated for its vivid blue colour, exceptional clarity and durability, making it an excellent choice for fine jewellery or gemstone collecting. Gemstone Details Species: Natural Topaz Variety: Blue Topaz Trade Colour: Swiss Blue Shape: Oval Mixed Cut Weight: 7.04 ct Measurements: 14.00 × 10.00 × 6.47 mm Transparency: Transparent Colour: Intense / Vivid Blue Colour Quality: Fine Colour Quality Certification Laboratory: ALGT – Antwerp Laboratory for Gemstone Testing Report Number: 91630736 Certificate included with the gemstone. Treatment As stated on the ALGT report, blue topaz is commonly enhanced by irradiation and/or heat to produce its blue colour. There is currently no scientific method available to determine whether this particular gemstone has been enhanced or not, and the certificate reflects this standard gemological disclosure. Condition Excellent overall condition. Bright polish with attractive lustre and vivid colour. Please review the photographs carefully, as they form an integral part of the description.Natural Swiss Blue Topaz – 7.04 ct – ALGT Certified Offered is a beautiful natural Swiss Blue Topaz with an attractive vivid blue colour and excellent brilliance. The gemstone has been fashioned in an elegant oval mixed cut that displays bright reflections and impressive sparkle. This gemstone is accompanied by an ALGT (Antwerp Laboratory for Gemstone Testing) certificate, confirming it as Natural Topaz with the trade colour designation Swiss Blue and a Fine Colour Quality grade. Swiss Blue Topaz is highly appreciated for its vivid blue colour, exceptional clarity and durability, making it an excellent choice for fine jewellery or gemstone collecting. Gemstone Details Species: Natural Topaz Variety: Blue Topaz Trade Colour: Swiss Blue Shape: Oval Mixed Cut Weight: 7.04 ct Measurements: 14.00 × 10.00 × 6.47 mm Transparency: Transparent Colour: Intense / Vivid Blue Colour Quality: Fine Colour Quality Certification Laboratory: ALGT – Antwerp Laboratory for Gemstone Testing Report Number: 91630736 Certificate included with the gemstone. Treatment As stated on the ALGT report, blue topaz is commonly enhanced by irradiation and/or heat to produce its blue colour. There is currently no scientific method available to determine whether this particular gemstone has been enhanced or not, and the certificate reflects this standard gemological disclosure. Condition Excellent overall condition. Bright polish with attractive lustre and vivid colour. Please review the photographs carefully, as they form an integral part of the description.