Usually, dental veneers are made of porcelain. Still, they can also be made of dental composite materials, which have unique characteristics of their own.
Porcelain is hard-wearing and non-porous, meaning that it is strong and does not stain easily.
Composite is slightly more porous but has a similar opacity to enamel, meaning that although it may tarnish over time, it can be a more natural-looking finish.