Patina is a thin layer that variously forms on the surface of copper, brass, bronze, and similar metals and alloys, or certain stones and wooden furniture, or any similar acquired change of a surface
Copper roof on the Minneapolis City Hall, coated with patina
The Dresden Frauenkirche. The church was destroyed during the bombing of Dresden in 1945 and rebuilt from 1993 to 2005 with new material; the stones with the black patina are the parts that survived the firebombing from the original 18th-century church.
Pre-colonial copper coin formerly used in the Copper Belt (Democratic Republic of the Congo and Zambia). The external layer has been weathered by moisture and rain, leading to the oxidation of copper.
Copper weather vane with verdigris patina
In traditional Japanese aesthetics, wabi-sabi centers on the acceptance of transience and imperfection. It is often described as the appreciation of beauty that is "imperfect, impermanent, and incompl
Patina
…Crazing Wabi-sabi Angier, R.H. : Firearm Blueing and Browning, Onslow County 1936…
Zen garden of Ryōan-ji, built during the Higashiyama period. The clay wall, stained with subtle brown and orange tones, reflects sabi principles, while the rock garden reflects wabi principles.
A Japanese tea house reflecting the wabi-sabi aesthetic in Kenroku-en (兼六園) Garden
Wabi-sabi tea bowl, Azuchi–Momoyama period, 16th century
Modern tea vessel made in the wabi-sabi style