24 octobre 2019
Christie’s & De Beers Group present Rare Treasures of the Earth - London, 8 to 12 November 2019
From left: A Quartz Crystal Cluster from Arkansas 90 x 87 x 57 cm, The Cullinan Dream: A 24.18ct Fancy Intense Blue VS2 Rectangular-Shaped Diamond, A 1.09ct Fancy Purplish Red SI2 Square-Shaped Diamond, An Amethyst Geode with Calcite and Agate from Brazil...