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Shows how common rocks and minerals can be identified by color, texture, hardness, streak and other standard procedures.
January 1, 1971
Coronet Films
2021
1948
2023
2016
2025
1975
2025
2023
2021
2008
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2019
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2014
2010
1991
2023
2020
2019
2018
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2006
1996
2013
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2015
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2020
2025
1999
1951
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1963
2005
2018
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2016