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  1. Gold in Meteorites And in the Earth's Crust - USGS

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  2. Describing Rocks | USGS Schoolyard Geology

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  9. Rocks and Minerals - Encyclopedia of Arkansas

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  11. The Geology of coarse gold formation - NUGGET

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  12. How to Test a Rock for Gold | eHow

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  13. Video: Identifying Gold Rocks | eHow

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  16. The Mineral Gold - YupRocks.com - Pictures of

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  19. There is Gold in Them Thar Hills | Natural Resources

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  20. The Rock Identification Key - by Don Peck

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  23. Iron Ore: Sedimentary Rock - Pictures, Definition

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  26. Identifying Rocks and Minerals - UW-Green Bay

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  27. Geology of gold - SBS Radio

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  28. Rocks, Rock Information, Facts, News, Photos --

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