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Gem and mineral site

Eskisehir meerschaum

Meerschaum (sepiolite)

Turkey holds essentially the world’s only significant supply of true meerschaum, the feather-light white stone (“sea foam”) dug from pits around Eskisehir and carved into the famous pipes that colour to amber with use. Miners sink shafts by hand into the clay to reach the nodules. Turkey restricts export of the raw block to protect the carving trade, so buy carved pieces there.

Where it is

Meerschaum (sepiolite)
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The source

https://en.wikipedia.org/wiki/Meerschaum

Nearby

Other places on the map within a couple of hours.