Rock salt
In cheshire you can find rock salt in the mines.
Raw salt
the county of Cheshire in North West England has some large salt mines. There may be other areas, I'm only aware of Cheshire because I used to live there!
Found in the mines of India.
Some are found there but not
"Mines" is the simple subject and "are found" is the simple predicate in a passive voice.
Mostly mines
The chlor-alkali industry is found in Cheshire as the county contains large amounts of profitably extractable sodium chloride, one of the the raw materials used in the manufacture of chlor-alkali products
Oil and gas are both found in mines. Mines are found all over the world, including Alberta, Canada. There are also many mining locations in the middle east as well.
Mostly mines but they could be found in quartz rivers
Cheshire cheese and cheshire pork pies!
Cheshire can be found on Horse Isle 3 in the Enchanted Fjords region, near the Town of Tundra. It is known for its mysterious and magical aura, attracting players looking for adventure and exploration.