verdigris

A blue-green patina or rust that forms on copper-containing metals.

Let's to^([sic]) the museum. Cannon-balls; arrow-heads; Roman glass and a forceps green with verdigris.

[…]there were three small brass coins there, the gift of Ymar. Their legends, like their faces, had worn away; and they were dark with verdigris — in appearance precisely the ancient things they were.

Copper acetate.

The color of this patina or material.

Gamboge is one of the firſt yellows, which may be made to produce five or six ſorts of Green with verdegreaſe, according as the gambooge is in the greater or leſſer proportion; if it abounds, it will make a tolerable oak green, and being mixt with a greater quantity of verdegreaſe, it will make a fine graſs Green.

[…]let them tell me candidly which is nearest truth, the gold of Turner, or the mourning and murky olive browns and verdigris greens in which Claude, with the industry and intelligence of a Sevres china painter, drags the laborious bramble leaves over his childish foreground.

To cover, or coat, with verdigris.

[…] there were always some wretched musicians, with an old fiddle, an old clarinet, and an old verdigrised brass bugle[…]