Sterling silver is an alloy of silver made up of around 93% silver and 7% other metals, such as copper, all blended together to form the substance. What type of mixture is sterling silver?

An alloy is a mixture of two or more elements that are combined in varying proportions.

A mixture can be categorised as a homogenous or heterogenous.

A homogenous mixture is one in which the different components have the same composition throughout and exist in a single phase. In contrast, in a heterogenous mixture, the components have varying composition and might not be evenly blended to form a single phase.

In Sterling silver 93% silver along with 7% other metals are uniformly mixed to form a homogenous mixture.

a homogeneous mixture, because the different componets are mixed evenly within the substance