Grey Black Lichen 1 Gallon Bag: Grey Black Lichen ranges in size from 1 inch to 4 inches. This lichen often has a greenish tint when first picked, but changes to a black and white color when dried. What makes this lichen unique is its ruffled paper-like look. Can be moistened to restore pliability. Last's a long time if kept dry. 1 Gallon Bag. (This item requires additional shipping of $5.53 for the first item, and $2 for each additional item + regular shipping costs.)