On the purchase and maintenance papers of jewelry jewelry

Positive jewelry is a decorative item made of various gems, pearls, ivory, emerald, diamonds and other rare and precious materials such as grinding, carving, inlaid, and stringing. Natural jewelry is natural and elegant, uniform in color, and transparent texture. The beautiful artificial artificial aluminum -containing glass, synthetic ruby, sapphire, and gold steel diamonds such as artificially processed jewelry. Natural jewelry surface is smooth. Strong discounts. This article analyzes the reasons for pearl yellowing from two aspects of crystalline learning and thermodynamics. The principle of crystallization of pearl yellowing is the transformation of the crystal structure The result of conversion; while thermodynamics is warm ..., line