The oldest earth-born object known to man, this tiny item is a part of our planet's crust which crystallized an astounding 4.4-billion-years ago. Older than our planet's diamonds. Older, even, than extraterrestrial iron and crystal that fell to earth from the sky.
When the Great Imperial Crown was made for the coronation of Catherine the Great in 1762 the court jewelers believed they were topping over 5,000 diamonds and pearls with an enormous 398 carat ruby. But it was never so. They had been fooled by a charming imposter.