niggarite

1) general term for any reflective, though utterly worthless, naturally occurring mineral such as pyrite (fool's gold)

2) fake flashy jewelry; cheap bling

DeAndre thought he was mad rich, until the pawn shop owner informed him his stolen pouch full of gold was nothing more than niggarite.

Denizen 1: Yo, look at shorty's diamond ring shine.
Denizen 2: Dummy, dat shit ain't not'n but niggarite on her finga!