Calcium Carbonate for Ceramic Glazing is available in white powder form. Calcium Carbonate is used as scouring powder and as an ingredient of household scouring creams.
Calcium Carbonate has relatively low hardness level of 3 on the Mohs scale of mineral hardness that makes it scratchproof against glass and most other ceramics, enamel, bronze, iron and steel. Calcium Carbonate for Ceramic Glazing can be used to clean tarnish on silver, in its paste form.