... 2. various styles for your reference 3.graphite/quartz/ ceramic crucibles Quartz/ceramic/crucibles for melting 1. our industry can ... manufacture various kinds of ceramic crucibles,such as graphite , quartz , magnesia, alumina,zirconia crucibles etc , used for jewelry , ... to our customers . 3. we selected the highest purity fused silica as materials in which iron and basic metals are very ...