Grog

Rarity: Common

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At a glance

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Notion

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Science and technology

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What Wikipedia says

Grog, also known as firesand and chamotte, is a raw material usually made from crushed and ground potsherds, reintroduced into crude clay to temper it before making ceramic ware. It has a high percentage of silica and alumina.

Excerpt from the Wikipedia article “Grog (clay)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: ChNPP, CC BY-SA 3.0, via Wikimedia Commons.