A Cauldron symbolizes femininity and fertility, rebirth and transformation, the Western Quarter and the Element of Water. When used during Ritual on the Altar the Cauldron can be used to hold a candle, or to burn loose incense or magickally empowered herbs on a charcoal disc (here's a link to our charcoal discs).
You can also create "Witches Brews" which are magick spells in liquid form within your Cauldron. Here's a link to a typical Witches Brew. Witches Brews should not be made in a cast iron Cauldron because it will cause your "brew" to darken, instead choose a ceramic or copper Cauldron for your brews.
Black Salt, a powerful banishing potion can be made within your Cauldron (follow this link for my personal recipe).
A black cast iron Cauldron makes a great scrying tool, simply add water and gaze within.