... is carbon at atmospheric pressure. And it must be said that carbon in that form (or 'phase', as mineralogists say) is just as valuable if not more so than diamonds (also carbon in a different phase). You can't draw with diamonds. And though I appreciate jewels and am wowed by them -- I have several books on jewellery and gemstones and have gawked at the Crown jewels from a young age -- nonetheless, art made with the help of graphite either in its early or final forms is surely no less worth treasuring. And in the end, what is more interesting: the Koh-i-Noor diamond or a drawing by a great artist?