21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-06 09:33:06
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-31 08:06:15
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-23 12:08:11
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-08-01 08:49:36
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-22 10:57:52
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 11:31:43
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-01-24 12:09:40
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28 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-02-01 08:58:28
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29 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 15:42:02
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30 | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 02:52:14
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