Juxtaposition: the fact of two things being seen places close together with contrasting effect.
When different materials are juxtaposed on a home’s exterior, they create a visual contrast that draws attention. This contrast can be in terms of color or texture, but the interplay between contrasting elements adds visual interest and can make a design stand out.
In the case of the home below, the contrast is in the texture of the two materials: stone and stucco. Juxtaposing materials can help achieve a sense of balance and add depth and tactile interest to a design as well as create a dynamic visual experience that adds richness to the overall composition.

It’s important to note that the successful juxtaposition of materials requires careful consideration of the architectural style and the overall design intent to create an exterior that is contrasting and cohesive at the same time.