The 'chunk' is a super blue speck of zircon found out in Western Australia's Jack Hills, however, don't get your cameras out just yet, as the piece in question is at a microscopic level.

The supply of zircon is generally limited, and typical sizes depend on color. Blue or green stones normally range from 1 carat to 10 carats and yellows and oranges up to around 5 carats. Reds and ...