Sorry! They are Tahitian pearls. Apparently. They just look the spitting image of freshwater pearls, in pink, peach and white, all those classic Tahitian colours:
Or, if $350 isn't enough for you to waste on cheap junk, you could spend $3,500 on this "conversation piece":
The conversation would, I imagine, be something like, "Oh, how sweet! Did your four year old make it for you for Mothering Sunday?"