MINDE insists to use high purity material which is import from U.S dose ... 1,fewness bubbles2,high purity3,can be made according to the requirement of our customersHigh purity quartz crucible,the ... and coating method.To ensure the high purity of quartz crucible,minde insists to use high purity raw material which is import ... made according to the requirement of our customers. High Purity Quartz Crucible