"The heart of Anna Lopukhina, royal mistress to the Emperor of Russia, turned to ice after his assassination in 1801 and, it was said, on her subsequent death at 27, cut into a gem by the Winter Palace's royal jeweler. Approximate Dimensions: H: 46mm (1.81"") W: 66mm (2.60"") D: 10mm (0.39"") Weight: 47g (1.66oz)"

• "The heart of Anna Lopukhina, royal mistress to the Emperor of Russia, turned to ice after his assassination in 1801 and, it was said, on her subsequent death at 27, cut into a gem by the Winter Palace's royal jeweler.

"The heart of Anna Lopukhina, royal mistress to the Emperor of Russia, turned to ice after his assassination in 1801 and, it was said, on her subsequent death at 27, cut into a gem by the Winter Palace's royal jeweler.Alchemy of England