没有保留价 - 1 pcs 蓝色 黄宝石 - 7.09 ct - 安特卫普宝石检测实验室（ALGT）

Natural London Blue Topaz – 7.09 ct – Oval Mixed Cut – ALGT Certified

Offered is a beautiful natural London Blue Topaz weighing an impressive 7.09 carats, displaying a rich deep blue colour with excellent transparency. The gemstone has been fashioned in an elegant oval mixed cut, enhancing its brilliance and making it ideal for a bespoke ring, pendant, or collector's piece.

The stone exhibits an attractive, even colour distribution with lively brilliance and a pleasing face-up appearance. It is accompanied by an ALGT (Antwerp Laboratory for Gemstone Testing) Identification Report, providing additional confidence in its authenticity.

Gemstone Details
Species: Natural Topaz
Variety: Blue Topaz
Trade Colour: London Blue
Shape/Cut: Oval Mixed Cut
Weight: 7.09 ct
Measurements: 13.91 × 10.01 × 6.57 mm
Transparency: Transparent
Certification
Laboratory: ALGT – Antwerp Laboratory for Gemstone Testing
Report Number: 55327315

According to the accompanying ALGT report, blue topaz is commonly enhanced by irradiation and/or heating to achieve its colour. Current gemmological methods cannot determine whether this particular gemstone has undergone such treatment, which is standard industry practice for blue topaz.

The photographs were taken under different lighting conditions to provide an accurate representation of the gemstone's colour and overall appearance. Please review all images carefully, as they form an integral part of the description.

A fine certified London Blue Topaz of substantial size, suitable for jewellery or as an addition to any gemstone collection.