If you purchase RTA or ready to assemble cabinets, they usually have stickers on the side of the cabinets which have information about its features and what it is made of. If the cabinet is old and the sticker is gone, another way to identify if it is birch wood is to check its appearance. Birch cabinets are usually light brown or golden in hue. It also has a rough texture, and its surface frequently creates smudgy and jagged patterns.