The deposit of rock salt in Wieliczka and Bochnia has been mined since the 13th century. This major industrial undertaking has royal status and is the oldest of its type in Europe ... The two mines ...

But extracting the coveted salt means descending into dark caves, then blasting and carrying heavy rock. Faizan Panjwani: The problem is the massive size of the blocks that come from the mine.

Production at Europe's only underground sand mine is set to be doubled following new investment. Sand from Lochaline Quartz Sand (LQS) is used in making windows, glass containers and ceramics.

Beneath the waters of Cayuga Lake, a salt mine that has been in operation for over 150 years is working tirelessly to meet the increased demand. Shawn Wilcyznski, facility manager at Cargill in ...