Quartz, Crystalline Silica Toxicity (hazard)
(Materials) Quartz 741. Kuvars 741 (Materials) Quartz 761. Kuvars 761 (Materials) Quartz 762. Kuvars 762 (Materials) Flint Pebbles (Materials) Silospar Potash/sodium/calcium Feldspar (Materials) Edgar Glass Sand (Hazards) Quartz Toxicity on Clayart. Quartz is one of the most dangerous materials used in ceramics, yet it is irreplaceable.