Provided are a silicon oxide-coated zinc oxide, a silicon oxide-coated zinc oxide-containing composition, and a cosmetic that can suppress a decrease in viscosity caused by a carbomer when applied to an aqueous material. The silicon oxide-coated zinc oxide of the invention is a silicon oxide-coated zinc oxide containing zinc oxide particles and a silicon oxide film on the surface of the zinc oxide particles, and has a suspended water conductivity of 120 μS / cm or less.
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