18K white gold hallmark (750/000) ring set with a rectangular faceted sapphire weighing 3 carats, set with 12 navette-cut diamonds framed by two lines of smaller brilliant-cut diamonds. TDD : 55. Gross weight: 11 g. The sapphire without "thermal modification" is accompanied by a CARAT GEM LAB certificate dated 28 January 2025, stating: - Mass: 10.36 carats - Shape: Cushion - Dimensions: 13.24 x 8.95 x 8.15 mm - Colour: Intense blue (the colour changes to "Violet" under the light of an incandescent lamp). - Identification : Sapphire change Colour : Variety of coridon of natural origin. - No thermal modification observed. - Provenance : Sri Lanka (Ceylon). Attached: CARAT GEM LAB certificate. High resolution photos: https://bit.ly/hdv-lausanne Exhibition : LA SALLE 20 rue DROUOT 75009 PARIS Tuesday 7 April 10 am - 6 pm and Wednesday 8 April 2026 10 am - 5 pm Live sale behind closed doors 1004 LAUSANNE - SWITZERLAND : Friday 10 April 2026 2 pm Delivery of lots free of transport costs to PARIS, LYON, MARSEILLE and LAUSANNE a few days after the sale. Or shipment from FRANCE at the buyer's expense by the carrier of his choice.