The phrase "diamond skull" refers to someone who is intellectually or mentally brilliant. It suggests that their mind is as strong and valuable as a diamond. Full definition
The work acts as a sequel to Hirst's first diamond skull, «For the Love of God» (2007). (damienhirst.com)
Blue chip, Hirst certainly is, and his new show features oil paintings, another brave move by the artist better known for diamond skulls and pickled sharks. (theguardian.com)
From diamond spider webs to ear - cuffs set with bats, and crystal studs guarded by black diamond skulls, take a look at the Halloween trophies that will give your costume an edge for Fright Night. (en.vogue.fr)