A new, nice form of carbon:
http://uk.io9.com/5772790/fluffy-diamonds-could-be-a-completely-new-form...
http://prl.aps.org/accepted/L/2f077Y3cM3c17d2fd32988139a1b5f891cd22eaea
In EP there are likely dozens of diamond versions and bizarre carbon allotropes used in different circumstances. And of course, under the right circumstances even "normal" allotropes like buckyballs can turn into odd states like gels:
http://www.newscientist.com/article/dn20158-carbon-buckyballs-can-turn-t...
http://arxiv.org/abs/1102.2959
They might even cure acne:
http://www.ncbi.nlm.nih.gov/pubmed/20887812
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