Sure metallic parts, when in extended contact with pores and skin, can produce a greenish discoloration. This happens attributable to a chemical response between the steel, perspiration, and different substances on the pores and skin’s floor. For instance, jewellery containing copper is commonly related to this impact.
The phenomenon is usually innocent and poses no important well being threat. Traditionally, the presence of inexperienced staining from jewellery served as an indicator of the steel’s composition, highlighting using alloys containing reactive metals. Whereas not harmful, this discoloration will be aesthetically undesirable for some people.