In 250 years, only four similar diamonds have ever gone to auction at Christie’s.
Works by Art Deco master potter Charles Catteau are being offered online through August 23.
Christie’s is offering editioned works by notable artists online through July 26.
This year, the market for meteorites has been blasting off.
The global president of Christie’s talks about selling the most expensive painting of all time.
Rare works are among the lots in a single-owner sale on June 27.