The Earring Curator has dated these Art Deco Chrysoprase Earrings to the 1920s.
There is a little solder at the back of the fittings, they were likely converted long ago to lever backs from older screwbacks or similar.

• Hallmarks/stamps: None (likely lost when the fittings were changed). The earrings and fittings test as 925 sterling silver.
• Fixing: Silver lever backs.
• Era: Art Deco (c.1920s).
• Size: 3.4 x 1.4cm.
• Weight: 7.4g.
The Earring Curator has dated these Art Deco Chrysoprase Earrings to the 1920s.
All things earrings
You can view the stock and full dealer information on the The Earring Curator Profile Page