There are other artifacts that may be used in a rite, among them are: rock salt, Rune Stones (old Celtic or Gothic logograms,) actual Crystal Balls (usually of some form of earth element, which may or may not be transparent.) Carol also has a small set of bells; others may use drums for an increase in the quantity of vibrations in the air.
In sum the artifacts used may vary, but they must represent the four elements of nature: Earth, Air, Fire and Water. There is usually a main candle called the goddess candle. This is the first candle lit. Then the witch lights the rest of the candles from this one. There is then a sage plant for cleansing; this represents the womb (for which I draw the connection to Mother Earth.)
Then there are crystals and stones. Again, like the crystal ball, may be made of various Earth elements. And finally some sort of cauldron: Carol had a small one (that would fit in the palm of the hand) which seemed to have been made of some sort of cast metal.