21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-13 14:12:25
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22 | Add to Reading ListSource URL: www.americanberyllia.comLanguage: English - Date: 2012-05-17 12:59:04
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23 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-05-04 17:40:55
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24 | Add to Reading ListSource URL: www.lotusgemology.comLanguage: English - Date: 2014-03-28 23:39:20
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25 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-11-23 19:06:09
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26 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-06-11 12:38:30
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27 | Add to Reading ListSource URL: www.krist.unibe.chLanguage: English - Date: 2012-02-09 08:53:04
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28 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-04-19 17:07:32
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29 | Add to Reading ListSource URL: materion.comLanguage: English - Date: 2011-10-15 14:59:27
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30 | Add to Reading ListSource URL: pubsites.uws.edu.auLanguage: English - Date: 2008-03-17 05:32:07
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