WASHINGTON D.C., USA 15 January 2008 – The famous 45.52 carat blue stone known as the Hope Diamond glows red when viewed under ultraviolet light, Jeffrey Port, curator of the National Gem Collection at the Smithsonian Institution’s National Museum of Natural History in Washington, D.C, said.
Port and other scientists studied the stone and other examples of very rare natural blue diamonds loaned by diamond dealers and reported on their finds in the journal Geology.
Port said the red color the Hope Diamond displays under ultraviolet light comes from trace amounts of the element boron, which makes the stone appear blue in normal light. The unique mix of boron and nitrogen now known to exist in the Hope Diamond could help researchers determine whether the Hope Diamond was cut from a much larger rough stone from India that also yielded part of the pre-Revolutionary French crown jewels, he said.
A service of the Antwerp Facets News Service (AFNS).