Vegan Sugar? Natural Milled? I'm very confused?

So, I know that they use bone char in the refining process or whatever for cane sugar. Does natural milled cane sugar not use bone char? If not, what about organic cane sugar? Is brown sugar cane sugar, and what about brown sugar syrup? Please help me I want to become vegan, but I'm kinda confused on what I can and can't eat. Thanks!