| 11. | At the end of the 19th century, tin ore was found in the Kundang River.
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| 12. | Inside, there were veins of bright purple tin ore.
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| 13. | Being rich in tin ore deposits, the dominion was under almost continuous threat from outsiders.
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| 14. | England had iron, zinc, copper, lead, and tin ores.
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| 15. | There is mining of copper, iron, manganese, gold, cassiterite ( tin ore ), and phosphates.
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| 16. | Hushing was also widely used in Medieval and later periods to extract lead and tin ores.
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| 17. | The fact that scholars have been unable to pinpoint Bronze Age tin ore deposits compounds this problem.
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| 18. | It has tin ore deposits, and high-grade uranium has also been found in the form of zeunerite.
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| 19. | Kampar is situated in the Kinta Valley, which was well known for its high tin ore reserves.
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| 20. | Almost simultaneously, the first tin ore was discovered on the southern edge of the mountains in Bohemia.
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