Thursday was named for Jove, or Jupiter from the Roman pantheon, and the planetary correspondence for Thursday is, of course, Jupiter. The planetary symbol for Jupiter is:
Jove/Jupiter was associated with leadership, thunder and lightening, and wealth. Other associations for Thursday and Jupiter are: prosperity and abundance, good health, leadership and generosity and expansion.
Colors associated with Thursdays include: green, white, purple, crimson, turquoise, green and royal blue.
Thursday is a good day for magickal work involving prosperity and abundance, but that doesn't necessarily mean monetary gain and having flashy new toys. It can be abundance of good health, happiness, etc. This would also be a good time to do some magickal work involving your budget, though, such as eliminating spur of the moment purchases.