The mark consists of a circle having inverted half moons on the right and left sides of the circle with the arced wording FB18 AUTHORIZED above a line with a half moon extending upward and the arced wording THEORY NANO with the terms separated by a dot below a line having a double half moon above the arced wording. There is a water droplet in the center between the half moons and the entire mark is surrounded by a scalloped circle with a dot in each half moon on the outside of the inner circle.
Color is not claimed as a feature of the mark.