The diamond master set from GemOro allows for easy color grading.
This diamond master set from GemOro offers an accurate array of CZ master stones for easy color grading. The individual color of each stone is laser inscribed on the stone's table for easy visibility with a 10x loupe. Includes a lifetime warranty against color change. Comes in a protective case with built-in grading tray, leatherette carrying pouch, and stone holders also included. This set includes 0.50ct stones graded E,F,G,H,I,J,K,L,M,N. Comes with LED Built in, powered by Mini USB with built in battery.