Wikipedia
Black Ivory is an R&B group from Harlem, which had a number of hits in the 1970s, including "Don't Turn Around", "You and I" (which featured Larry Blackmon from Cameo on drums), "I'll Find a Way (The Loneliest Man in Town)", "Spinning Around", "What Goes Around (Comes Around)", "Will We Ever Come Together", and "Mainline."
Usage examples of "black ivory".
Its eyes burned red like coals, and its teeth were black ivory set in wholly black gums.
He lifted his head and spread his ears wide, turning to face them, and they saw his tusks, those legendary shafts of black ivory raised to the sky.
This was the mad villain who'd kidnapped me to the Slave Coast on his hell-ship in '48 (on my own father-in-law's orders, too), and perforce I'd run black ivory with him, and fled from she-devil Amazons, and been hunted the length of the Mississippi, and lied truth out of Louisiana to keep both our necks out of a noose.
When Abdee began to tell Craddock about the cargo of slaves anchored on Canal Street, though, Craddock excitedly unsnapped his sleeve guards, replaced his green visor with a wide-brimmed straw hat, and moved with the agility of a much younger man as he hurried to investigate what he called 'priceless black ivory'.
The Weavers complicated mouthparts unhinged, its inner jaw flexing, something between a mandible and a black ivory trap.
It seemed to be made of black ivory and shaped rather like the grip of a revolver, while the striking mechanism was of blued steel.