Art Deco Sterling Silver and Onyx Triangle Screw Back Earrings

These unusual pieces came from our grandmother’s jewelry collection. STERLING is stamped on the foot of the screw back, very hard to photograph but we tried! Similar ones online appear to date to the mid-century 1950s.
 
These just to the side of the ear lobe. H 1 3/8” x L 1/2”
Approx 0.4 oz
 
Disclaimer: We have tried to make sure colors shown in photos are representative of the real colors of each item. We have tried to identify all imperfections in descriptions, but we may have missed some. If you are unhappy with your purchase, let us know.