All the 'tools' are only additions to the craft to help focus your purpose, and aside from that have no significance. However, the ritual care of them is important, as it helps your subconcious mind to focus better. Asperser - A device used to sprinkle water for purification at the beginning of a spell or ritual. It is usually made from silver or brass. It is never used for actual cutting, although some traditions use it to cut the handfasting cake.
Some witches like to construct their own athame rather then buy one.
Book of Shadows - A magickal journal, where spells, incantations, invokations, dreams, herbal recipes, ritual notes, and divination results can be recorded and kept. It is usually carefully written in a nice hardcover book, although many variations can occur, including versions on computer disc, in old note-pads and the like. Candles - Frequently used in spells, with their particular colors, fragrances, and inscriptions serving a symbolic purpose. Chalice - A goblet or cup used to hold the wine shared around the circle of those participating in a ritual. Charcoal - In ritual, charcoal is often used for inscribing and ceremonial incense is often burned on a charcoal saucer.