The Hope Diamond Formed At The Bottom of The Ocean
Type IIb diamonds are really rare for a reason.
By David Grossman
Aug 2, 2018
As far as natural phenomena go, blue diamonds are among the world's most treasured. Known as Type IIb diamonds, their fame has only been boosted by the most well-known example, the Hope Diamond. A new study examining their rare properties suggests that their signature blue come from an equally rare source: the Earth's lower mantle.
Type IIb diamonds form when carbon atoms form intensely strong bond. Their greyish-blue features come from trace particles of boron, comparatively less rare than diamonds, caught up within these bonds. These diamonds formed around a billion years ago, during the Earth's formative years.
https://www.popularmechanics.com/science/environment/a22625234/hope-diamond-formation-boron/
