black opal

noun

, Mineralogy.

1. a dark variety of opal having the characteristic opaline play of color.

black opal

noun

1. any opal of a dark coloration, not necessarily black

Example Sentences

She has rings for him to don at his opening, including a black opal that sparkles in the sun.

From Los Angeles Times

“Uncut Gems,” out Wednesday, stars Sandler as Howard Ratner, a jeweler in Manhattan’s Diamond District who tries to repay his gambling debts by auctioning off a long-sought-after rock from Ethiopia containing rare black opals.

From Washington Post

Inside the guts of a fish packed in ice, a precious, raw black opal embedded in rock is making its way to Howard.

From Seattle Times

KG, as they call him in the film, becomes obsessed with this black opal that's a centerpiece of the story.

From Salon

He’s plotting the score of a lifetime: importing—or, rather, smuggling—a rare, uncut, large black opal from Ethiopia, which he’s expecting to sell, through an upscale auction house, for a million dollars.

From The New Yorker