Alloy: A mixture of two or more metals that combines their properties to create a new material with specific characteristics.
Patina: The natural tarnish or color change that occurs on the surface of metals like brass over time, adding depth and character to the artwork.
Repoussé: A metalworking technique where a design is hammered into the backside of a sheet of metal (such as brass) to create a raised relief on the front side.