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 Post subject: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 04, 2018 1:11 pm 
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Look at this color, this is the best piece of jadeite i ever have! I will make so many nice cabs from this beauty!

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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 04, 2018 3:01 pm 
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Does that fracture surface look a little conchoidal and vitreous to anyone but me?


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 04, 2018 3:05 pm 
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If you are talking about the large notch on the lower section of the top, it looks like trim saw marks that have been buffed along with the rest of the stone to me.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 04, 2018 3:08 pm 
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I was looking above that, but perhaps it is just how my monitor is interpreting the photograph.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 6:00 am 
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You are right Barbra, it does look a little vitreous, certainly enough to warrant a little care in analysis.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 12:09 pm 
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Alan F. wrote:
You are right Barbra, it does look a little vitreous, certainly enough to warrant a little care in analysis.


At first, i refused to believe this is jadeite myself, inclusions are kinda fishy. But, i presented a piece of it to professional gemologist and was assured that it is indeed a jadeite.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 1:26 pm 
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The easy test is to put a small drop of medium strength hydrochloric acid on the stone. On Jadeite it will be absorbed, unless the stone has been polymer treated, which is unlikely on a piece of rough like this. If the acid is absorbed, watch carefully around where the drop was and you should see the surface "sweating" acid through the micropores of the stone.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 1:41 pm 
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I've never tried that Alan.
Has anyone else? :-k
Where is 1bwana1 when you need him?


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 4:51 pm 
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Recommended by Alan Hodgkinson. I tried it and it works, also revealed that a piece of jadeite I thought was "A" grade was in fact "B" grade. I didn't pay a lot for it so it wasn't a huge loss, but still!


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Wed Oct 10, 2018 10:35 pm 
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I am here, but my experience with Jade is very limited. I never tried that test.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 11, 2018 2:41 pm 
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What is medium strength hydrochloric? Is it diluted with something.
I know gold testing acid is nitric diluted with hydrochloric.
Can I give that a try?
Any discoloration to the jadeite?


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 11, 2018 5:21 pm 
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Barbra Voltaire wrote:
What is medium strength hydrochloric? Is it diluted with something.


One uses water to dilute hydrochloric acid. I think medium strength means something like muriatic acid that you can get at a hardware store.


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 11, 2018 5:59 pm 
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Thanks, Brian! Great hearing from you. Have you ever tried dropping acid on jade?


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 11, 2018 7:16 pm 
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Muriatic acid is just an old fashioned name for hydrochloric acid. Get concentrated acid and dilute it 50/50 with water (ADD THE ACID TO THE WATER, STIRRING VIGOROUSLY, OTHERWISE THE HEAT GENERATED CAN CAUSE SPITTING)


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 Post subject: Re: Sharing my great find (purcashed nice jadeite )
PostPosted: Thu Oct 11, 2018 7:23 pm 
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Sorry, only answered half your question. Acid will not harm jade unless it is dyed, it certainly makes a mess of dyed. In his book "Gem Testing Techniques" AH has photographs of the effects on A, B and C jade.


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