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 Post subject: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Sep 21, 2012 12:02 am 
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Is there a sure proof method to tell the dyed and natural lapis apart by the picture?
Is having a lot of pyrite indicative of anything at all?

thanks in advance


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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Sep 21, 2012 10:10 am 
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One would have to test the stone in person.


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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Tue Sep 25, 2012 12:22 pm 
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I'm in Afghanistan; I see a lot of Lapis. I use alcohol wipes...works every time. A lot of pyrite is indicative of a high percentage of pyrite. High quality Lapis is stark blue with as little pyrite as possible and as little calcite as possible. As in any other material, it's up to the purchaser, or recipient. Some lapis cabachons look great with characteristic pyrite groupings; or patterns. The best blue is about the same color as the topic text...


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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Tue Sep 25, 2012 1:40 pm 
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SweaterFreak wrote:
Is there a sure proof method to tell the dyed and natural lapis apart by the picture?
Is having a lot of pyrite indicative of anything at all?

thanks in advance


There's honestly no good way to tell anything about anything with a picture. Think on-line dating :-)

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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Tue Sep 25, 2012 11:14 pm 
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:lol:

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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Nov 23, 2012 1:17 am 
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Definitely one should take the lab test. I would like to share lapiz i am having it


Attachments:
File comment: Round 14.7x14.7
6.18 ct

LZF01.jpg
LZF01.jpg [ 13.57 KiB | Viewed 2360 times ]
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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Nov 23, 2012 12:09 pm 
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Hi hildebdr,
Alcohol huh? I was thinking acetone (found in nail polish removers) was better. Best regards, Lee

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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Nov 23, 2012 8:31 pm 
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I agree to the use of Acetone but pure 96-98% alcohol is second choice.

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 Post subject: Re: Lapis Lazuli - how to tell real from dyed?
PostPosted: Fri Nov 23, 2012 9:21 pm 
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I don't know much about the base of dye but in the commercial painting business acetone and lacquer thinner are the two hottest solvents commonly used in the states. Best regards, Lee

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