Tahitian cultured pearls with a dark green-gray to blue-gray bodycolor and rose to purple overtones are referred to as what?

Tahitian cultured pearls that exhibit a dark green-gray to blue-gray bodycolor along with rose to purple overtones are specifically referred to as peacock pearls. This terminology derives from the captivating combination of colors that can resemble the iridescent hues found in a peacock's feathers. The unique coloration of these pearls sets them apart and defines their classification within the realm of cultured pearls, especially as they are predominantly produced in Tahiti.

In contrast, black pearls is a more general term that does not encompass the specific overtones and bodycolors characteristic of peacock pearls. Golden pearls are distinctly different, typically featuring a warm yellow to golden color that does not match the cool hues of dark green-gray or blue-gray tones. White pearls are also not appropriate in this context as they denote a completely different, lighter coloration without the complex overtones associated with peacock pearls. Thus, the description of color and overtone in the question clearly aligns with the definition of peacock pearls.