Uncountable noun and Countable minerals

1. There is zinc is found in south America
2. There is gold is found in Sumbawa.
3. There is coal in the middle east of United Kingdom
4. There is iron ore in Sumbawa also but in the mine.
5. There is copper in Peru
6. There are diamonds in the mine in Sumbawa
7. There are sapphires in the Cambodia
8. There are emeralds in the Colombia
9. There are rubies in the Thailand
10. There are pearls in the mouth of the shell