New Mineral Named After GIA’s John Koivula
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 Post subject: Quiz for all, especially GTP owners!
PostPosted: Sun Nov 26, 2006 10:54 pm 
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All the stones above have similar visual tones. All the stones above are different gems. Name that stone!
Using standard gemological tools:
1. Polariscope: doubly refractive
Refractive Index: Over the limit
Specific gravity: 3.52
Pleochroism: 3 colors
Extra: With magnification, I can see a splintery fracture

2. Polariscope: doubly refractive
Refractive Index: 1.643-1.634: Biaxial
Specific gravity: 3.17
Pleochroism: 3 colors
Extra: Spectroscope: strong line at 553

3. Polariscope: doubly refractive
Refractive Index: 1.688-1.678
Specific gravity: 3.29
Pleochroism: 3 colors
Extra: With magnification, concoidal fracture

4. Polariscope: doubly refractive: Bulls-eye with coniscope
Refractive Index: 1.553-3.544
Specific gravity: 2.65
Pleochroism: 2 colors
Extra: With magnification, I can see a concoidal fracture

5. Polariscope: doubly refractive
Refractive Index: 1.644-1.624
Specific gravity: 3.06
Pleochroism: 2 colors
Extra: Spectroscope: nothing

6. Polariscope: doubly refractive
Refractive Index: Over the limit
Specific gravity: 4.70
Pleochroism: 2 colors
Extra: With magnification, facets appear slightly abraded


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PostPosted: Sun Nov 26, 2006 10:59 pm 
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I'll play if the prize is a free trip to San Francisco to study gemology with you :D


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PostPosted: Sun Nov 26, 2006 11:02 pm 
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Appease me here for a minute.
How long will it take you to positively ID these gems?
Come on. Give this a go!
Where's Gem-n00b when you need a sport?

Winner will get a parcel of brown faceted gems! To identify YOURSELF!!!
Quote:
I'll play if the prize is a free trip to San Francisco to study gemology with you

Snizzy is an automatic winner because her flattery is flawless!


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PostPosted: Sun Nov 26, 2006 11:44 pm 
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Snizzy has GTPro and it's not flattery - that's what I want for my prize!!


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PostPosted: Sun Nov 26, 2006 11:58 pm 
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Oh alright.... sigh.....

I'll get it started in hopes that some other "sport" will jump in.

#2 Andalusite

I can feel myself getting closer to San Francisco by the moment 8)


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PostPosted: Mon Nov 27, 2006 12:02 am 
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#6 Zircon

Jump in any time all of you "sports"....


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PostPosted: Mon Nov 27, 2006 12:08 am 
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So far, Snizzy is correct!
1.?
2. Andalusite
3.?
4.?
5.?
6.Zircon

Come on here #4 is a gift.


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PostPosted: Mon Nov 27, 2006 12:12 am 
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I think there is a typo on #4. Should the max RI be 1.544 instead of 3.544?

If so I am going with:
#4 Quartz


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PostPosted: Mon Nov 27, 2006 12:26 am 
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#1 Sphene


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PostPosted: Mon Nov 27, 2006 12:29 am 
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#5 Tourmaline

San Francisco, here I come.... right back where I started from....


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PostPosted: Mon Nov 27, 2006 12:31 am 
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#3 Axinite


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PostPosted: Mon Nov 27, 2006 12:42 am 
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So, to re-cap.
We have a winner.
1.Sphene
2. Andalusite
3. Axinite
4. Is actaully Smoky Quartyz; Too simple.
5. Tourmaline
6. Zircon

So, tell me, how long did it take you to ID these browns?


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PostPosted: Mon Nov 27, 2006 12:47 am 
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Barbra Voltaire wrote:
4. Is actaully Smoky Quartyz; Too simple.


So, tell me, how long did it take you to ID these browns?


I know - I was trying to add some excitement :lol: Do I get to keep the 6 stones?

It didn't take long at all - especially since I was playing solitaire. :cry:

If you want to delete my answers so that others can play - I wouldn't mind.


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PostPosted: Mon Nov 27, 2006 3:10 am 
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Barbra Voltaire wrote:

Where's Gem-n00b when you need a sport?


Darn it... I knew I should have been waiting home in front of the computer for quizzes! ;)

Oh well, Casino Royale was worth it... even the second time.


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PostPosted: Mon Nov 27, 2006 6:33 pm 
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What are you two doing up so early in the morning? :shock: :lol:


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