28.73 ct Natural Amethyst – Purple Cushion Offered is a beautiful 28.73 ct Natural Amethyst (Quartz) displaying an attractive purple colour with transparent clarity. The gemstone is fashioned in a Cushion shape with a Brilliant / Fancy cut, measuring 19.48 × 18.50 × 13.23 mm. No phenomena are observed. Gemstone Details: * Species: Natural Quartz * Variety: Amethyst * Weight: 28.73 ct * Colour: Purple * Transparency: Transparent * Shape: Cushion * Cut: Brilliant / Fancy * Phenomena: None * Dimensions: 19.48 × 18.50 × 13.23 mm GemLab Report Details: * Report No.: TH26G130246 * PIN: 2379 * Date: 11 September 2026 * Testing: Microscopy, EDXRF, Raman, FTIR, UV/VIS/NIR and LA-ICP-MS Treatment: See report comments. Amethyst is commonly heated or irradiated. According to the GemLab report, colour authenticity is currently undeterminable. A lovely 28.73 ct transparent Natural Amethyst with an appealing purple colour and elegant cushion shape, suitable for collectors and jewellery design.