ANSWER: Q-carbon
Explanation:
Diamond was once the hardest known naturally occurring material. Carbon has been used with a new process to create a substance called Q-carbon which is harder than diamond and graphite. This showcases the third phase or distinct form of carbon alongside graphite and diamond. The process of creating Q-carbon produces minuscule synthetic diamond "seeds," which can yield gems. Opportunities for creating synthetic gemstones pales next to possible applications of Q-carbon which the researchers said is magnetic, fluorescent and electroconductive.
