Post subject: unusual stone on the practical exam today
Posted: Fri Jun 18, 2010 2:11 pm
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Joined: Sun Oct 16, 2005 12:42 pm Posts: 2846 Location: Ho Chi Minh City, Vietnam
Ok, the practical exam was today. Apart from the nightmare of the "ID with loupe only" 5 stone set, it was fairly straight forward. I did have a doublet that was like nothing that I had seen in the class though.
Zircon or Apatite blue (which are the only stones in the syllabus with that colour), no spectrum, no doubling, a big bubble under the table. No RI reading, so either OTL or something weird going on. Visible join at the girdle.
Ok, so it was (to me) a doublet of some sort. We've never seen a doublet of this colour in our class though, athough the location of the joint would/should eliminate a GTD. Anyone seen one like this before?
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