It has four fingers and a thumb made from various metals and plastics, and even has polycarbonate fingernails to help it prise things apart.

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It evolved over the decades beyond its stainless-steel, time-only-display origins into a family of watches in various metals and hosting the most extreme of complications.

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One bit of the world I know a good deal about is the mining and processing of various minor metals.

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The other significant industrial user is iron and steel production, though iron ore and various other metals used to make alloys are also significant costs.

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In addition, though, it is doped with powdered quartz (the pure stuff, rather than the tainted variety that makes up most sand) and various reinforcing metals and fibres.

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Looking around the web you can see various explanations of the metals contents.

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Remarkably, the processes that cause colour vary radically in, for example, flames, water, various crystal, plants, metals and rainbows.

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In some large industries, such as metals, chemicals and cars, they continue in various forms.

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