All of the aboe noted stones would be good, and here's some others. Take your pick of these, they're all excellent for dealing with lawyers and court cases. JADE - enhances speech and eloquence, gives you an air of assurance and sophisitcation, and remember that in the orient Jade is considered a stone of prosperity for good reasons. GREEN MOSS AGATE is a lucky stone and leads you towards your best potential and best 'chances'. Any color of SAPPHIRE, but especially yellow if you can find a tumbled piece, will help you make good financial decisions. CITRINE is another stone of prosperity and can ensure an easy flow of conversation and understanding between you and your lawyer. And for strength and courage, conviction of purpose you can use CARNELIAN or RED JASPER. And not wanting to flog a dead horse here, but if you can lay your hands on some PICASSO marble/jasper that will keep you steady like a rock, so will SMOKEY QUARTZ.
Good luck with that!