Brass blank with an etched pattern, oxidized, covered by a thin layer of lacquer.
Metal - raw brass
Gauge -  20-21 gauge  (0.7-0.8mm) 
0.7-0.8 mm plate can undergo any mechanical treatment. Soldering can affect the oxidizing pattern but can be restored afterward. The plate of this gauge is perfect for creating a jewelry set (pendant, ring, earrings, etc.) or can be used for creating decorative elements for accessories like purses, shoes, buttons, belts, picture frames, and many others.

Please let me know in case you need a different measurement and gauge of the sheet.