EARTH - A Gem Of A Find – Oldest ‘Piece of Earth’ Discovered

  Measuring just 200 by 400 microns (about 4 times the width of a human hair on its widest dimension), one would think finding an ancient zircon to be harder than finding a needle in the proverbial haystack…or, in this case, like finding a nearly microscopic gemstone on a sheep farm in Western Australia. But geologists treasure A Gem Of A Find – Oldest ‘Piece of Earth’ Discovered was originally posted on: PlanetSave. To read more from Planetsave ...

http://planetsave.com/2014/02/24/a-gem-of-a-find-oldest-piece-of-earth