Gold, silver, platinum and mercury, 1869.

Nugget of gold, California; scales of gold, Australia; capillary silver, Sonora, Mexico; nugget of platinum, Choco, Colombia; scales of platinum, Ural; cinnabar or native vermilion, Spain. Cinnabar produces a red pigment used in dyes. Illustration from 'Underground life, or, Mines and miners' by Louis Simonin (1830-1886), published in London in 1869.