R.R.
Invite 10 friends,
You and your friends give them manicures and pedicures on their "10 finger and 10 toes," with gold nail polish,
Buy her a charm bracelet with 10 charms on it to commemorate her life so far,
Use gold plates, cups, tablecloths, etc, which should be greatly discounted right now after New Year's,
Make her cake and use edible gold dust on it (or have it made and ask the bakery to use it,
Go to a candy/cake supply store and purchase a mold to make #10 birthday suckers, and dust them with the edible gold dust (it's very easy, I made some Hedwig owl ones for a Harry Potter party, I used white chocolate for the suckers and used a tiny paintbrush to pick up the dust and flick it over the suckers) and tie them up in clear cello bags with gold twist ties,
If you give out goodie bags buy some gold cello bags to put the goodies in, or use clear ones with gold star stickers on them,
Sprinkle gold stars and gold number "10" confetti on the tables you use.
Hope this helps, have fun!
UPDATE:
And have her make a time capsule with 10 items that represent her life today, to be opened in 10 years : )