After the rare, massive blue heart diamond, which legend says once belonged to the empress consort of Napoleon III (1852-1870), before it was'discovered' by Cartier, in 1908. All Alchemy Gothic pendants are cast and hand-made in fine English pewter, many with additional high quality components, and all come complete upon their nickel-free chains, (or lace, cord, leather thong, etc), of the appropriate length. 100% Britannia pewter. Hand made in England. Authentic Alchemy of England brand merchandise.