References

Dronova, N.D., 2001. Evaluation of Jewelry and Precious Stone Costs. Delo Publisher, Europe, Pages: 296.

Kaukina, O.V., 2013. The formation of project culture for future designers in the course of vocational training at a high school. Bull. Volzhsky Univ., 4: 102-110.

Kovaleva, L.A., S.N. Krainov and V.I. Kumanin, 2000. Jewelry Technology Materials. Textbook Publication, Moscow, Russia, Pages: 128.

Kumanin, V.I. and V.B. Livshits, 2012. The Materials for Jewelry. Astrel Publishing House, Italy, Pages: 240.