Talk:Quartz/@comment-177.195.40.228-20150815181522/@comment-27498033-20151229095834

Silica, in the form of quartz, is naturally present in many kinds of coastal sand. Now, it's possible the sand of an alien world would be composed of something else but making the distinction between "glass made from sand" and "quartz glass" is meaningless. Regular glass and quartz glass can both be made from sand, the only difference is the purity.