This listing is for a pair of Shungite Frosted Crystal Quartz  Crystal Earrings. The earring wire wrap is Copper(it will oxidize and turn dark) and the earring wire is Sterling Silver. 
Shungite helps protect your energy fields from harmful EMF(Electromagnetic Fields) and Negative Energy.  
Clear Quartz absorbs, stores, releases energy. It's a balancing stone and also protects from chemicals and EMF.
Note: I recommend cleaning your crystals with Selenite or The Sun. I avoid cleansing all crystals from the moon for personal reasons. 
Customizing is available.