Tarnished silver spoon. Silver tarnishes slowly as sulphur compounds in the atmosphere react with the surface to form black silver sulphide (Ag2S).

---

Size: 4848px × 3966px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: angiosperm, angiosperms, annual, asteraceae, bellioides, biological, biology, botanical, botany, compositae, desertstar, flower, flowering, flowers, mojave, monoptilon, nature, plant, plants, white, wildflower, wildflowers, yellow