5 Simple Statements About Crystal Explained
Calcite crystals tend to be used in optical products, as well as the graphite in pencil lead are sheets of crystals that primarily crack apart layer by layer to write down. Silica can sort silicate crystals which happen to be the basis for quartz, mica, olivine, and all kinds of other crystals and minerals.杂质、裂纹越少越好。质地好的