Franklin Faceters Frolic 10 (FFF10) July 27, 28 & 29 at The Factory Franklin, NC
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 Post subject: Re: Unknown green stone.
PostPosted: Fri Mar 25, 2016 2:33 am 
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Yes, im not sure about anything in this stone, only that it looks like cheap treated quartz.
I have a little bit difficulty to believe thats what it is due to I know the seller and he have not at all a interest to sell that to me.
But of course, someone might have been able to scam him.
I also find it strange to be quarts when I make easy to see scratches with both turkish diaspore and peridot.

I will take it to a lab in Hanoi next week.

Thanks for all the input.

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 Post subject: Re: Unknown green stone.
PostPosted: Fri Mar 25, 2016 11:01 am 
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Let us know what you find out. :D


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 Post subject: Re: Unknown green stone.
PostPosted: Sun Jul 16, 2017 12:07 am 
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Location: Luc Yen, Vietnam
Hi, im back. I could not figure out my old login as "Bezelbub".

The green piece was looked at by a guy saying he is a gemolog, and had a look in a microscope(only I think) and said it's glass, due to bubbles.
So I thought, ok Barbra, you were right..but not feeling sure, I postponed answering here. Then forgot about the whole piece for a long time.

But ok, I have been getting some more testing equipment lately and also I bough a huge piece of clear green rough of a trusted guy here in Vietnam that is for sure
the vietnamese "transparent amazonite"/orthoclase that I was hoping the piece in this tread would may be.
I saw that this new piece had quite similar color and appearance, but a much more obvious layer structure from what i guess is cleavage. Some areas along the edges looks like the beautiful rice paddies in the mountain sides of Sapa, layers upon layers.

Well, so today I went to my local cutter, got a flat polished, then took the RI, then SG, then checked that it was double refractive and I got this:

Light green rough
Double refractive
64.40ct
Weight in water: 39.29ct
(Loss of weight in water, 25.11ct)
RI: 1.53 (still training on my new fable 003)
SG: 2.56

Which suggest it was exactly what I was hoping for when I bought it. Right? Or did I go wrong somewhere? Or what else can it be if I did my test right?

Thoughts?

Geir Atle


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 Post subject: Re: Unknown green stone.
PostPosted: Sun Jul 16, 2017 1:55 pm 
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Hi Geir,

maybe Apophyllite...( not sure...)

http://www.classicgems.net/gem_apophyllite.htm

If you click on "information" there is a list of all RIs ( most gems - some are missing)...

Maybe this helps.

Is it the single item on your instagram account?

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 Post subject: Re: Unknown green stone.
PostPosted: Mon Jul 17, 2017 10:41 am 
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I don't think it is likely he would mistake apophyllite for any gem material in the rough. It has a weird plasticy feel and is very very cleavey.


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 Post subject: Re: Unknown green stone.
PostPosted: Mon Jul 17, 2017 1:20 pm 
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Stephen Challener wrote:
I don't think it is likely he would mistake apophyllite for any gem material in the rough. It has a weird plasticy feel and is very very cleavey.


O.K. :smt023

What do think it is - course for vietnam "amazonite" quite large and clean - which would be great!! A beautiful material indeed.

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 Post subject: Re: Unknown green stone.
PostPosted: Wed Jul 19, 2017 1:44 am 
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Thanks guys, I own two large pieces and one cut oval of 3.80ct-ish of what has the same data, one is this rough 64ct one, and one huge 180ct one, both posted in instagram, probably more then once. The 180ct one has a huge clean gem in it, but a bit lighter in color. Its posted in my private facebook group too, found by searching BalderGems(not page, but group).

I will check this apophyllite if the case is overlapping characteristics. Thanks!

I also have a few more pieces of less facet quality, but still cuttable, so it starts to heap up, just need to be 100% sure what it is, and that its from here, which I know really, but how to be credible and "prove" that?

Geir Atle Gussiås

https://www.facebook.com/groups/baldergems/


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 Post subject: Re: Unknown green stone.
PostPosted: Wed Jul 19, 2017 1:52 am 
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Location: Luc Yen, Vietnam
64 ct + 180ct + 3.80ct facet. It all points to Minh Tien, 1998 pocket of green feldspar and test same numbers as mentioned over.
Added Led light in this photo and takes a nice glow. Tried to edit as much as possible to look as in person, seen in my iMac display.
Beside this I have some untested smaller pieces as suspects, and a confirmed one that is recently mined. It seem they find very randomly this material still.

Geir Atle

Video of the 180ct: https://www.instagram.com/p/BWdON6uADaR ... ems_&hl=en
Video of the 64ct: https://www.instagram.com/p/BWmGY4eAENu ... ems_&hl=en

https://www.facebook.com/groups/baldergems/


Attachments:
File comment: That top left piece is 180ct. Thats huge, haha. This photo is very near how it looks in person when adding some light.
19990542_10155497355905126_5585493495517973359_n.jpg
19990542_10155497355905126_5585493495517973359_n.jpg [ 19.7 KiB | Viewed 91 times ]
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 Post subject: Re: Unknown green stone.
PostPosted: Wed Jul 19, 2017 3:37 am 
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You say "nice glow" when using a LED - you checked LW and SW UV?

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 Post subject: Re: Unknown green stone.
PostPosted: Wed Jul 19, 2017 3:47 pm 
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Traditional translucent amazonite can have a wonderful paraiba-like glow in some cases despite its lack of fluoresence. I have never seen one of these faceted ones in person but the chromophore is the same so it would not surprise me if they showed a similar effect.


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 Post subject: Re: Unknown green stone.
PostPosted: Wed Jul 19, 2017 5:09 pm 
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I have seen some in real life - small, often not eyeclean - so Geir rough is really usual - hope we get news from Vietnam.

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 Post subject: Re: Unknown green stone.
PostPosted: Sat Jul 22, 2017 3:19 pm 
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Hi,

I did a quick check with LW UV which is the only UV light I have at hand, and it dont show any other reaction then a bit coloring of the UV light itself and a colorless glow or how to describe it. It looses its green. White-ish or maybe what gemmos describe as chalky? Maybe my vision just get a bit blurred from the UV light. Not sure.
Size of clean parts in these rough is unusual indeed, and I'm looking forward to see them as a precision cut suite one day which would be optimal. Let's see what is possible :roll: :mrgreen:

Geir Atle


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 Post subject: Re: Unknown green stone.
PostPosted: Sun Jul 23, 2017 7:59 am 
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Hope you will give us infos after you cut the rough.

Do you have the RIs of the cut stone and the optic character?

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