Feldspar rock – a kind of igneous rock
A feldspar rock quarry in India Is feldspar rare? Feldspar is a very common igneous rock. More than half of the Earth's crust is made of feldspar. What are igneous [...]
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06, 2017
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06, 2017
Tang Dynasty Chinese Pottery – Medieval China
T'ang Dynasty cup (Musee Guimet, Paris) Who invented porcelain? About 700 AD in China, plain white porcelain pottery first begins to appear, like these cups and these bowls. What is [...]
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06, 2017
Aluminum – Atoms and Chemistry
Diagram of aluminum atom Aluminum is one of the heavier atoms that forms inside a red giant star after a star begins to run out of fuel. An atom of [...]
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05, 2017
What is kaolin clay? History of Art
A chunk of kaolin clay Kaolin clay and porcelain Kaolin is a kind of clay with a lot of aluminum, silica, and oxygen in it. It is the kind of [...]
