From 500-year-old crowns to heirlooms once owned by Napoleon, Europe is home to some of the world's most fascinating and extravagant pieces of jewellery thanks to its rich history. 　　从具有500年历史的王冠，到曾为拿破仑拥有的世袭珠宝，欧洲因历史悠久而拥有世界上最迷人而奢华的珠宝。 　　Now, George Pragnell, a British jeweller b...