St. Edwards Crown http://royalexhibitions.co.uk/crown-jewels-2/royal-regalia/
St. Edwards Crown http://royalexhibitions.co.uk/crown-jewels-2/royal-regalia/

Letting Gems Speak: My New “Matter” Column For The New York Times

We typically look at rubies and other gems as treasure, bling, or signs of matrimony. But they are also historians, telling us about what the Earth was like hundreds of millions of years ago. In today’s Matter column in the New York Times, I talk to geologists who treat jewels as archives of planetary history. Check it out.