When it comes to metal—be it a copper pan or an antique made from bronze—differentiating between a patina, tarnish, and rust can be tricky. While natural discoloration on these pieces is often highly ...

Have you ever picked up your favorite fancy knife — because we all have a favorite — and noticed that it's started to take on some strange coloration? Maybe you've tried rubbing it off, but the dark ...

Although the dictionary describes patina as "a green or brown film on the surface of bronze or similar metals, produced by oxidation over a long period," we see it differently. Every August, during ...