Suitable for measuring the diameter of diamond, gem and agate beads.
Portable folding fan-shaped gem size and diameter measuring tool, made of aluminum material, light quality, easy to store.
You can choose from many styles: 6 arms fan-shaped, 8 arms fan-shaped, and 6pcs round shape .
With the help of this sizing gauge ,you will to calculate the size and weight of a diamond.
With professional size scale on the surface, it is a very practical tool for jewelers and jewelers.