YIGZYCN Foldable Diamond Grading Card Diamond Color 4C Grading Paper Sorting Tray Gemological Identification Tools Diamond Color Grading Tray

The color comparison card tray can be used to identify the colors of and gemstones. Easy to use. The size is approximately 12.5x9cm/4.92x3.54inch. Foldable. Easy to carry. The colorimetric card can observe the color of the itself under the lights of a colorimetric lamp. When grading a dedicated colorimetric light is used, and a colorimetric board paper is used as the background. The whiter the color, the rarer and more the Tips: Color comparison cards are auxiliary tools for distinguishing color levels, not a comparison tool for color grading.