A number of the most valuable gemstones are new discoveries that ... In its green form, however, it's beautiful enough to be considered a rare gemstone. These samples are rarely found outside ...

It's pearly luster and serene colour make it a favorite among high-end collectors who are drawn to stones that are as rare as they are beautiful ... of the most valuable and wanted gemstones ...

Discover the most expensive clocks ever sold, their prices, and why these rare timepieces are so valuable to collectors and ...