玛瑙是一种微晶石英类矿物，纹理细腻，色彩丰富。
Agate is a microcrystalline variety of quartz (silica), characterised by its fineness of grain and brightness of color.
本文在总结了石英类饰品的自身特点和分类，分析目前石英类饰品的市场概况和销售模式。
This essay is to summarize the characteristics and classification of quartz decoration, and to analyze the current market general situation and the sale models of quartz decorative products.
正是由于这个原因，许多石英岩类玉石都是用模子压出来的，没有手工雕刻的痕迹。
It is for this reason, many types of quartzite jade are out of the mold pressure, there is no trace of the hand-carved.
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