optical quartz glass plates are with high clear color, and polish them, if client need Specification:Material: JGS1, JGS2, ... /50Form: circle, square, ellipse, or upon requirement Quartz glass has some excellent characters, such as high temperatura resistance, low ... , good chemical stablity, good uniformity etc. It can made quartz plate, optical lens, prismand other shape accroding to customer's ...