Each image of the earrings is created by an illustrator.  They are then placed in a glass cabochon.

The earrings are in silver metal (lead free, nickel free) 

Does not require any particular maintenance. 

Some precautions:

Do not put in contact with water, a source of heat / flame, or products containing acetone (solvent) or alcohol (perfume). 

Store your jewelry away from direct light.