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properties. The main component is SiO2. The quartz sands are ivory or without color and translucent. The hardness is 7. They are brittle and without cleavage. They have the shell-like breaking part and the color of grease. The relative density is 2.65. They have the textural anisotropy in chemical, thermal and mechanical properties. They are not dissoluble in acid and slightly soluble in KOK solution. The melting point is 1,750. They are ivory, light yellow, brown and grey. They have rather high fireproof performance. Because of special physical properties, chemical properties and strong resistance to acid medium, the quartz sands play an important role in the base construction of highways, plastic racetracks and artificial lawns. 
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Lianyungangshi Dongxin Quartz Company Co.,Ltd
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quartz sand