It seems Shirley Bassey, the singer of Diamond are Forever, should correct her view. Based on recent experiment, scientists have discovered that Earth's hardest natural material evaporates under exposure to light.
A rock was placed under intense light pulses in the UV-C band - the harsh ultraviolet rays filtered out by the ozone layer - and small pits in the diamond surface were visible after only a few seconds.
But before diamond lovers around the world start to panic, note that the rate of evaporation is very small and not noticeable under normal conditions (In fact, even under very bright UV conditions, such as intense sunlight or under a UV tanning lamp, it would take approximately the age of the universe - about 10billion years - to see an observable distance). But still one reason for bourgouis not to use diamond in open (the one because it may attract a lurking thief of course).
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