New Mineral Named After GIA’s John Koivula
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 Post subject: who am I? (difficult one)
PostPosted: Sat Aug 29, 2009 5:01 pm 
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I'm a major source for rare earth element, and cascaillou thinks I'm beautiful


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PostPosted: Sat Aug 29, 2009 5:07 pm 
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Euxenite?

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PostPosted: Sat Aug 29, 2009 5:47 pm 
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Monazite....?

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PostPosted: Sat Aug 29, 2009 5:55 pm 
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Well I would say Apatite?


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PostPosted: Sat Aug 29, 2009 6:03 pm 
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Bastnaesite

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PostPosted: Sat Aug 29, 2009 6:18 pm 
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I agree, more likely Bastnaesite...

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PostPosted: Sat Aug 29, 2009 7:17 pm 
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Hi

I think maybe MoDo is right ,Euxenite

Euxenite , is made up of : yittrium , calcium , erbium , lanthanum , cerium , uranium , thorium , niobium , chloride .

while Bastnaesite : cerium , lanthanum , yittrium , carbonat , flouride .


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PostPosted: Sat Aug 29, 2009 7:34 pm 
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But Euxenite is normally flattened crystals and is brown/black rather than the orange/red I see in this stone isn't it?

I guess we don't know what size that stone IS do we???? :roll:

I'll stay with Bastnaesite.

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PostPosted: Sat Aug 29, 2009 7:46 pm 
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I'm going to guess Xenotime, not because I think it is, but because no one else will. :)


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PostPosted: Sat Aug 29, 2009 7:58 pm 
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Karim, you're so naughty.....!!!

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PostPosted: Sat Aug 29, 2009 8:03 pm 
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Hey, it contains yttrium as well as dysprosium, erbium, terbium, and ytterbium. Plus, it can be yellowish, brownish, reddish! :P Granted, I've never heard of a faceted example...


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PostPosted: Sat Aug 29, 2009 8:08 pm 
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Well down HME, I thought that would be a difficult one...it is indeed bastnaesite (which is a major source of cerium)
This mineral can be confused with parisite and synchisite (two other orange rare earth carbonates), but these have a lower density.
I think bastnasite also exists in some 'grassy' green color which I like a lot too.


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PostPosted: Sat Aug 29, 2009 8:49 pm 
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Good on ya, Kevin!

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PostPosted: Sun Aug 30, 2009 1:10 pm 
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Thank you Princess MoDo.

In good gemologist form, I gathered my tools, carefully observed the facts, recorded details, and then decided that it just looked a lot like bastnaesite. :wink:

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PostPosted: Sun Aug 30, 2009 1:52 pm 
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Hi

Well done kevin , good thing this was just a quiz of i would have flunked lol, but its fun :wink:


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