Camphor crystals (Cinnamomum camphora)
are an incense commonly associated with Wicca or Pagan ceremonies while also used just as a pleasant aromatic or to help open nasal passages.
Camphor crystal is frequently used to relieve muscular aches and pains, insect bites, local skin irritation and as a mild odorant. Camphor Powder is also used as perfumery ingredient in soaps, cosmetics, etc.
It looks like tightly packed snowballs.