Just in time for Easter. YOHAKU's PORCELAIN AROMA STONE - EGG is a charming addition to your fragrance collection. Coming from Arita ware, a famous style of Japanese porcelain with a 400 year-old history, this aroma stone was crafted to be used together with aroma oils or aroma mists. Simply drop oil or spray mist and the stone will gently spread the aroma in your personal space.