241 | Add to Reading ListSource URL: earthsciences.ucr.eduLanguage: English - Date: 2010-10-07 18:15:41
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242 | Add to Reading ListSource URL: novascotia.caLanguage: English - Date: 2010-09-13 11:20:29
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243 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-06-13 13:58:10
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244 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 11:20:58
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245 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-06-19 07:56:02
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246 | Add to Reading ListSource URL: www.science-teachers.comLanguage: English - Date: 2004-12-09 12:39:36
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247 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-02-22 18:30:09
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248 | Add to Reading ListSource URL: www.jgeosci.orgLanguage: English - Date: 2007-07-30 07:11:52
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249 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-02-22 18:30:09
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250 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2009-07-04 18:40:08
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