石英质 meaning in English

quartziferous; quartzose; cherty
◇石英质壤土 cherty loam; 石英质岩石 capel

Fluviatile sands deposited by delta distributaries are quartzose .
三角洲分流中沉积的河流砂是石英质的。
Potential fossils are relatively rare in the final deposits of normal quartz-sand beaches .
在正常的石英质海滩的最终沉积物中隐匿的化石还是比较少的。
Tiger eye is a beautiful quartz gemstone that is found in western australia , south africa , united states , canada , india , namibia , and burma . the foremost important source of tiger eye is the mines in south africa . it is a lustrous yellow to brown color and has the look of glass with a white streak running through it
它是自然界的青石棉或蓝石棉被二氧化碳硅胶凝体强烈交代和胶结后所形成的呈棕、褐、黄、蓝等颜色，具有绢丝光泽的致密坚硬的石英质岩石，因为成份已变成石英，其硬度也上升为7 ，比重下降为3