Turquoise Stud Pierced Earrings in Sterling Silver

Vintage sterling silver stud pierced post earrings set with genuine turquoise. Both stone have some black matrix. They were made by Navajo artist Lennie Mariano and are hallmarked on the back. They measure 13mm by 10mm. They and the clutches need to be cleaned. There is some verdigris at the base of the posts where these is solder (has copper). Together they weigh 4.1 grams.