La Piedra Coasters - Set of 6This is our go to gift hostesses, bosses, dads, long lost cousins. No matter how tough the critic or distant the relative, this coaster set is sure to impress. Hand carved in jet black volcanic rock and white marble stone, these handsome devils take several days to complete. Each one is made start to finish in a fair trade environment in a design studio in Tonal, Guadalajara. Note: Coasters have cork backings to protect surfaces from scratches.