you could always try one of these chakra pendants, as well, like the one N1ghts0ng speaks about here:
http://tarotforum.net/showthread.php?t=181123
Sometimes, with crystals, you just have to keep trying and then adjusting things...adding or removing to the mix you use...and also cleansing and recharging them is important, too. As well, they usually take some time to work. Blue Kyanite I find works fast, as does Alexandrite, but I find a lot of the other stones take time. I had a dream the other night about using some green Dalmation Jasper, and in my dream, the crystal healer told me "it takes at least 21 days to work" lol! So don't move too quickly - pick one or two, and then build on them over time...sure hope they work for you!
And DownwardSpiral is also correct, there are others besides Kyanite that operate to do a full chakra cleansing. You might want to spend an hour or two looking through some healing crystal sites
as well as reading some of the crystal studies posted here over the last few months. Lots of good info in there
one last thing - there is also a phenomenon called a "healing crisis" which basically means that you begin to use something (like a specific crystal or a medicine or whatever) and you immediately temporarily feel worse ;p as though all of your symptoms have sharpened dramatically. This does ease off in the first 24 hours but it is also taken as a sign that the medicine is working - as long as you DO begin to feel progressively better and better the next day!
Also, many people I know who work with crystals for healing - and myself included - have felt a sudden rush of blood to the heart when working with a particular crystal - your heart just suddenly begins to beat like crazy, can feel almost like the sign of a panic attack - but this passes quickly, and is taken as a sign that you have personally "connected" or are aligned to the crystal. It's a good thing, trust me! After the heart rush, one normally feels slightly euphoric (probably because of the rush of blood to the head! lol!)