925 Sterling Silver Black Agate Onyx Stud Earring Necklace Set

Necklace material: 925 sterling silver 
Gemstone: Black onyx
Chain length: about 15.7inch + 2.4inch extension chain 
Pendant height: about 0.6inch
Earrings material: 925 sterling silver 
Gemstone: Black onyx
Size: 0.5*0.4inch