Clay

Clay is a type of fine-grained natural soil material containing clay minerals. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 2.0

AURUMLEAF

The craft of gilding — gold leaf, tools, and techniques.

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Museum entries, images, and facts are drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses.