Accurate Diamond Color Grading Master Set GIA Colors D-M 10 Stones

Introducing the world's first nano technology master grading set for diamonds. An absolute necessity for all jewelry stores, diamond dealers, wholesalers, brokers, and students. Stone color is guaranteed for the life of the product. Comes with 10 stones in 5 sizes, with 6 colors between each stone of the same size. A measurement scale is included, so there is no need for a magnifier or scale. Comes in a compact, easy to handle box.

Features:

• GIA Colors D, E, F, G, H, I, J, K, L, M
• Unique nano technology for accuracy and stability.
• Tested and approved by diamond grading experts
• Stones are slightly different in size, so user can easily identify stones (no engraving used to preserve natural stone appearance)
• Comes in compact, easy to handle and secure case with stone size measuring scale
• Lifetime guarantee against color changes from the manufacturer
• Made in Japan