While polishing a piece of the Havero meteorite that fell to Earth in Finland in 1971, researchers discovered an intensely rich carbon-loaded spot that could not be smoothed by a diamond containing polishing paste. A closer look at the meteorite revealed two completely new kinds of naturally occurring carbon structures that are harder than diamonds formed within the Earth.
Such “super diamonds” had been predicted to exist decades ago but have never before been found in nature. Researchers found that these “super diamonds” consist of fused graphite sheets similar to artificial diamonds. The discovery will help scientists gain a better understanding of carbon polymorphs and give them material to investigate and possibly synthesize super diamonds.
Will this devalue the worth of your diamonds! Of course not! Diamonds are still beautiful! Just an interesting little tidbit of new information 
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Interesting!! Harder than diamond? I wonder how hard that would be. This is a new experiments for the scientists.But really nothing can devalue diamonds to me.It is just too beautiful on its own.
Wow, cool. Finally something harder than ‘the hardest substance in the world’.
Do these two substances look good on a gold or a silver ring? I don’t think so. I’m sticking to diamonds. A jewelry like a Jamesallen diamond ring brings out the beauty of a woman from the time of Cleopatra up until now.
I heard about it and it is kind of cool. But it needs a prettier name though. Nothing can beat diamonds for we ladies.
Now do I have to buy my girlfriend a lonsdalite ring that costs a little more than 3 months salary now?
Out of curiosity I clicked on link AND I CAN’T BELIEVE IT!!! It’s true, there is a stone (with a hardness of 5-6, about right) harder than diamond. I have got to find out the etymology.