Matter: In Glittering Gems, Reading Earth?s Story

[unable to retrieve full-text content]Gems ? each forged with its own recipe of elements, temperature and pressure ? offer precious clues to some of the most profound questions about the life of our planet.

Source: http://www.nytimes.com/2013/06/13/science/in-glittering-gems-reading-earths-story.html?partner=rss&emc=rss

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