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Astron Zircon Zinc oxide is a pale yellow granular powder, Insoluble in water.  It has two production types American and French process.

Astron Zircon Zircon Flour is a coarse or fine white mineral powder that is naturally occuring, chemically inert and stable to very high temperatures. Insoluble in water, dilute acids and hot concentrate sulfuric acid. Zircon is a mineral belonging to the group of nesosilicates. Its chemical name is zirconium silicate and its corresponding chemical formula is ZrSiO4. Hafnium is almost always present in quantities ranging from 1 to 4%. The crystal structure of zircon is tetragonal crystal class. The natural color of zircon varies between colorless, yellow-golden, red, brown, and green. Colorless specimens that show gem quality are a popular substitute for diamond; these specimens are also known as “Matura diamond”. It is not to be confused with cubic zirconia, a synthetic substance with a completely different chemical composition.

Astron Zircon Zirconium silicate is a white mineral powder that is chemically inert and stable to very high temperatures. Insoluble in water, dilute acids and hot concentrate sulfuric acid.