In a large bowl, cream together the butter and brown sugar until smooth. Beat in the egg and molasses. Combine the flour, ground ginger, baking soda, and salt; stir into the molasses mixture using a wooden spoon. Mix in the fresh and crystallized gingers. Cover, and refrigerate dough for at least 2 hours, or overnight.
Preheat oven to 350 degrees F (175 degrees C). Shape dough into 1 inch balls, and place about 2 inches apart onto ungreased cookie sheet.
Bake for 10 minutes in the preheated oven, or until lightly browned. Cool on wire racks.