Please note: This list is an absolute optimum. Not all the things on the list are needed always. The items indicated with stars are the absolute basics needed to do most spells.
Altar clothes
*Athame
Beads
Baskets
Bell
*Book of Shadows
*Books for info
*Bowls (not plastic or metal!)
Brooms
*Candles (tea lights are always nice)
Candle holders
Capes and Costumes
Cauldron
Chalices
Crystals and Gems
Crystal Balls
Decanter
Divination Tools
Earth
Feathers
Glass jar with cork
Herbs, dried plant, spices
Holy water
Holy Oil
*Incense, bricks, burners, and fire resistant plates
India Ink
Fabric for crafts
Felt
*Lighters
Magick mirror
Magical jewelry
*Matches
Mortar and Pestle
Oil
Musical tapes
Paint
Parchment paper
Pendulum
Pentagrams
*Pentacle
Pitchers
*Knife
Potpourri pot
Pouches
Quill pens
Rawhide, jewelry clasps, etc.
Rice
Runes
Rope
*Salt
Scales
Scissors
Sea Salts
Seeds
Shells
Statues
String
Talisman
Tarot cards
*Wands
Wooden boxes
Wooden Spoons
Back
The above image is courtesy of Meilin Wong