Sounds like maybe a Basic Bag?
How long ago did you put Black Rocks on it? If it's really sticky you can probably rub it out, you may have just used to much but it won't really hurt it. I would wait at least 24 hours to make sure it's absorbed and then buff it following Katev's excellent instructions.
Sometimes they are a little darker right after application but I would bet that after it soaks in it will end up the original color or close to it.
Yes, I googled Coach Basic Bag and it popped up!
Thanks for the advice, I was starting to think I'd wrecked it. I used Black Rocks about 3 hours ago, and it has a very tacky feel to it, and it's very very dark. However, I went into this project with an attitude of what have I got to lose, since it was so faded and scratched looking that I never used it. Thanks again.