GENEVA, Nov 2 (Reuters) - Russian royal jewels smuggled out of the country during the 1917 revolution, alongside rare coloured diamonds, are on offer at auction next week in Geneva, looking for deep-pocketed collectors emerging from the pandemic.Īn orange-pink diamond weighing 25.62 carats, estimated at 3.6 million to 5.38 million Swiss francs ($3.9 million to $5.9 million), set in a ring, is the star lot at auction house Sotheby's semi-annual jewellery sale in the Swiss city on Nov.