Twelve natural-color purple diamond crystals from Siberia, and seven round brilliants that were faceted from some of these crystals, were studied using spectroscopic methods to better understand their ...

It looks like you're using an old browser. To access all of the content on Yr, we recommend that you update your browser. It looks like JavaScript is disabled in your browser. To access all the ...

It looks like you're using an old browser. To access all of the content on Yr, we recommend that you update your browser. It looks like JavaScript is disabled in your browser. To access all the ...