Cupid before Jupiter amid Clouds late 17th century Netherlandish Unlike most of the other stones discussed here, this opaque blue-green mineral, a uranium-bearing aragonite, is soft and was easily worked to encourage generously rounded shapes. The hearty style lent itself to the embellishment of rich domestic furnishings such as cabinets. A cameo with Neptune and Galatea, larger but otherwise identical to this one in signature and workmanship, was on the Amsterdam antiques market in 1974.. Cupid before Jupiter amid Clouds 198341