There is also a sort of black stone, which is dug from the mountains and burns like wood.

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Details

Context

Describing coal in China in 'The Travels of Marco Polo'

Date / Period

1300

Source

https://archive.org/details/marcopolotravels00polouoft

Verification

Unverifiable

Explanation

Found in 1 providers: deepseek

Method

Cross Reference

Sources Checked

1 source

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