Unio species Mississippi River, USA Of floral bouquet design, with a circular-cut yellow sapphire, three fancy colored American natural pearls from the Mississippi River including a pink rosebud pearl, a carved Australian firey crystal opal flower, suspending a wing-shaped American natural freshwater pearl drop, mounted in 14K yellow gold, height 2 1/2 in, suspended from a delicate Keshi freshwater seed pearl necklace consisting of 3.0mm white and multi-color pearls, completed with two 18K clasps, length 15 in.