A beautiful natural Tanzanite (Zoisite) weighing 1.63 carats, displaying an attractive bluish violet colour. The gemstone is cut in an Oval shape with a Brilliant / Modified Brilliant cut and has transparent clarity. The gemstone is accompanied by an ICA GemLab laboratory report documenting its gemological characteristics. Specifications: * Gemstone: Natural Zoisite * Variety: Tanzanite * Weight: 1.63 ct * Colour: Bluish Violet * Shape: Oval * Cut: Brilliant / Modified Brilliant * Dimensions: 8.08 × 6.15 × 4.18 mm * Transparency: Transparent * Phenomena: None * Treatments: See comments * Certificate: ICA GemLab * Report No.: TH26G114763 * Report date: 26 February 2026 Treatment note: The laboratory report states that Tanzanite is commonly heated to improve or change the colour and that the colour authenticity is currently undeterminable. A lovely bluish-violet Tanzanite with a classic oval shape, suitable for collectors, jewellery designers and gemstone enthusiasts.