Dake, H.C.
The art of gem cutting : including cabochans, faceting, spheres, tumbling and special techniques - 7th ed. - California Gembooks 1963 - 97 p., ill.
549.091:736.2 / D3
The art of gem cutting : including cabochans, faceting, spheres, tumbling and special techniques - 7th ed. - California Gembooks 1963 - 97 p., ill.
549.091:736.2 / D3