V-groove is a decorative technique used on glass and mirror surfaces to create a V-shaped groove or channel in the surface of the material. This groove is typically created using a specialized tool that etches or cuts the surface of the glass or mirror.

V-groove can be used to create a variety of decorative designs and patterns, ranging from simple geometric shapes to more complex floral or abstract designs. It can be applied to any size or shape of glass or mirror, including flat or curved surfaces.

V-groove can be used on both clear and colored glass, as well as on mirrors. When applied to mirrors, the V-groove can add depth and dimension to the surface, creating a unique and visually appealing effect.