transforming graphite into this ultra-hard mineral. While this dashed hopes for finding a large, naturally-occurring vein of this potentially useful super-diamond, it did reinforce the idea that ...

In general, mineral particles are small, having formed within confined ... a different arrangement—explaining why diamond is the hardest mineral and graphite (used in pencil lead) is one of ...

Having just managed the evolutionary ... graphite (not to mention every other carbon mineral, from coal to oil to diamonds), exactly what type of graphite is formed depends on geological ...