Unio species Mississippi River, USA Known in the freshwater pearl industry as "strawberries" due to their baroque shape and the fact that they are dotted with natural protrusions, this pair of pearls possesses a color which is unheard of amongst Mississippi pearls--a rare natural golden color, with pink iridescence. They would mount beautifully as a pair of earrings. Weighing 6.35 carats and measuring 11.05 x 10.8 x 7.18 mm and the second, weighing 7.43 carats and measuring 11.64 x 10.80 x 7.40 mm, both undrilled. (2)