Here are various states of patina in bronze, copper, and brass in their naked splendor. : r/machinedpens

2mm Disc 24g Copper or Brass or Bronze or Nickel Silver Cutout for

Characteristic patina

Science Fun: True Colors of Ancient Bronze Artifacts

How to Apply Statuary and Patina Finish to Copper

copper patina. – q is for quandie

Copper and Brass Finishes and Patinas Hand finished - Proper

Patinating Copper The Metropolitan Museum of Art

Patina - Wikipedia

Pair Of Gilt And Patinated Bronze Restauration Candlesticks - Ref