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Free Online Gemology Courses https://gemologyonline.com/Forum/phpBB2/viewtopic.php?f=22&t=1074 |
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Author: | Barbara O. Ellis [ Sat Sep 16, 2006 12:45 pm ] |
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Dr. Barbara -- Thank you, thank you, thank you!!! I finally understand what the plus and minus signs mean for ions! I hope when I reach the crystal system section of your lessons I'll finally get a grip on those as well! |
Author: | dragonstek [ Thu Nov 15, 2007 4:58 pm ] |
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HI All i found another resourse for gemstoneswith review questions on it www.geology.iupui.edu/academics its GEOLOGY G130:GEMSTONES Fall 2001 if your looking for review questions |
Author: | dragonstek [ Mon Sep 08, 2008 5:06 pm ] |
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Hi i found these site while searching for gemstone info , lots of great articles written here http://www.jjkent.com/articles/index.htm check it out |
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