800*600
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Recommended Resolution: 800*600 |
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Home Both natural and artificial crystals are composed of silicon dioxide. Pure crystals should be colorless and transparent, yet such stainless natural crystals are rare on the surface of the earth. Most of the natural crystals, containing air bubbles and foreign elements, are not translucent. By contrast, artificial crystals, purified from quartz and processed by professionally cutting and polishing, are clear and lucid. In the process of production, lead is added to artificial crystals to intensify the light refraction. Due to complicated producing procedures and advanced techniques£¬some of the artificial crystals are more valuable than natural ones. As a symbol of purity and nobleness, crystal has fascinated more and more people throughout the world for collection and ornamentation. |
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