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PostPosted: Sun Aug 30, 2009 12:58 pm 
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Image

Here I'm am in formal dress


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PostPosted: Sun Aug 30, 2009 1:32 pm 
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Phosgenite

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PostPosted: Sun Aug 30, 2009 1:47 pm 
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HME wrote:
Phosgenite


Is that found in Germany? Oh boy...I'm a havin' fun!

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PostPosted: Sun Aug 30, 2009 1:51 pm 
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phosegene was poisonous gas the germans used in WWI..so maybe

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PostPosted: Sun Aug 30, 2009 1:59 pm 
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....psssstttt Jason....I love your current avatar of the 4 colored crystals. What are they?

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PostPosted: Sun Aug 30, 2009 2:37 pm 
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they are small tourmaline crystals..i have all kinds of little baggies here and there with different things and had those 4 in one by themselves for some reason..I decided to sell them on ebay and when I took a pic it turned out like that and caught my eye..thought it was a real cool..I think they sold for something like 10 -12 bucks or something..it's all in the pics..those stones would cost 20-30 cents maybe i think they were roughly 2-2.5 cts. each..it's all in the pics baby :D :D

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PostPosted: Sun Aug 30, 2009 3:52 pm 
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Still can't nail me? Hum what could I add...

I'm in good health: I do not lack calcium and I'm well hydrated!

I'm not that much of a mineral.

Coal is a good friend of mine.

well well it is all in here, somewhere :smt043 :-$


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PostPosted: Sun Aug 30, 2009 3:59 pm 
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Whewellite


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PostPosted: Sun Aug 30, 2009 4:34 pm 
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Yes, it is whewellite!

Although we consider it a mineral it is actually a natural organic compound found in coal mines.
It is monohydrated calcium oxalate Ca[C2O4].H2O
It is a rather rare mineral, and crystals are quite rare. Some of the best quality crystals have been found in Germany (Burgk anthracite deposits), and in France (Saint-Sylvestre deposits).
It is colorless or sometimes yellowish, usually transparent or translucent.
It shares the properties of many organic materials which is to say: release of H2O+CO+CO2 when burned, low melting point (200°C), very low hardness (2,5to3). Density is low too (2,22 to 2,23).

other exemples of organic minerals: amber, mellite...

ps: the whewellite crystal from the first picture is 1cm high and it is from France. The second picture (cut stone) is 1.46ct from germany.


Last edited by cascaillou on Mon Aug 31, 2009 7:50 am, edited 9 times in total.

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PostPosted: Sun Aug 30, 2009 4:43 pm 
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.....whew...... :smt033

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PostPosted: Sun Aug 30, 2009 4:52 pm 
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well well it is all in here, somewhere

maybe I have been a little too generous on that one :lol:


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PostPosted: Sun Aug 30, 2009 5:13 pm 
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Good one, cascaillou!!
Can we add your astounding gems to the Gemology Project?


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PostPosted: Sun Aug 30, 2009 6:12 pm 
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I missed your play with words there, I suspected it was kinda organic but it took me some time to look it up... always nice, one learn something new everytime ehehhe

Keep em coming!


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PostPosted: Sun Aug 30, 2009 6:59 pm 
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Can we add your astounding gems to the Gemology Project?

these are not my gems, just pictures from the web/books
What is the gemology project? A gem data-base?

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I missed your play with words there, I suspected it was kinda organic but it took me some time to look it up

good reasoning then, bravo!


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PostPosted: Sun Aug 30, 2009 8:00 pm 
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The Gemology Project is indeed a database. We try to add new things as we learn about them. :)


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