
you may turn
into a DIAMOND.
The Big Bang Theory Season 5, Episode 21

to turn it into
a tiny little DIAMOND
The Big Bang Theory Season 7, Episode 7

...that repurposes DIAMOND drill bits.
The Big Bang Theory Season 8, Episode 23

Neil Diamond?
The Big Bang Theory Season 7, Episode 3

Gaiman, and Diamond.
The Big Bang Theory Season 11, Episode 16