Birchwood's color ranges from white to reddish-brown. When cut or engraved, birch wood gives a dark brown burned color that shows off.
Birchwood is readily available in the market. One disadvantage of them is, they will easily rot if not surfaced with an added coating.
If you constantly find yourself engraving wood and metal surfaces, the Atomstack S20 Pro from ATOMSTACK can serve both purposes. There’s no limit as to what this potent laser engraving machine can do.