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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
2025
1975
2023
2021
2008
2017
2019
2016
2017
2014
2010
1991
2023
2020
2019
2018
2017
2006
1996
2013
2006
2015
2013
2001
2002
2020
2025
1951
1963
1999
1954
2016
2016
1955
2018