Crystalline Ginger? What on earth are you talking about?
Simply put these are sliced ginger root that are somewhat tenderized and I'm not quite sure how they do that, then encrusted with some sugar. Ginger Root is a very pungent herb. If you have ever had some ginger chicken at the local Chinese Restaurant, you know when you bite into a piece. They're spicy, even hot to taste. Very strong flavored, and rather woody in texture. There are also some medicinal qualities to this herb.
Now soak them in sugar and lay them out until they're ready with a little bit of fluid left in them. I have found them in my favorite Asian Market down in North Miami Beach, and also they have a ready supply of the stuff in the fruit stand that I got the Honeybells at that are in my refrigerator. Not the kind of thing I expect to find at a Publix, and Winn Dixie is way too low end for the stuff. You may find them in a gourmet shop, but mind you the stuff is strong. A little piece the size of a dime will clear your sinuses.
I have a pound bag of Crystalline Ginger in the kitchen, and some will go to work with me. Just pop a piece in the mouth and let the sugar melt off, then the Ginger will give you flavor for an hour, or chew it for an intense burst of flavor. If you like spicy food, I highly recommend the stuff!