Mexican sterling and green buying stone brooch/pendant & screw back earrings set

A sterling silver and green stone jewelry set consisting of a brooch/pendant and two screw back earrings. The shape is that of a heart shaped leaf, the stone is possibly bluish green chrysoprase with black flecks. The brooch measures 2 inches H x 1 5/8 buying W, the earrings 1 1/4 H x 7/8 W. The set weighs 29.6 grams. They were made in Mexico in the latter half of the 20th century. There is an unidentified maker's mark of 'JV or U.'

CONDITION: Very good. There is a tiny nick and surface abrasion in the brooch stone.
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