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 Post subject: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 6:03 am 
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Joined: Mon Sep 11, 2006 7:11 am
Posts: 102
Location: Cape Town
Is it possible to get 1mm round synthetic colourless spinel?
If so do you know where I could get some?


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 Post subject: Re: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 9:22 am 
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Joined: Fri Jul 04, 2014 8:17 pm
Posts: 614
Location: Halifax, Nova Scotia, Canada
Is there a specific reason why you want synthetic spinel? Colorless synthetic sapphire is plentiful and cheaper than dirt.


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 Post subject: Re: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 9:53 am 
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Joined: Mon Sep 11, 2006 7:11 am
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Location: Cape Town
My client casts around 15000 items of jewellery per month and has been setting 1mm round synthetic sapphires. His supplier has been slipping CZ's in the parcels which has caused quiet a stir by his clients. He is using a Presidium thermal conductivity tester and that indicates synthetic spinel at times. These stones are so small that testing is difficult and doing some testing myself have found it pretty easy to separate CZ from synthetic sapphire or spinel if the instrument is used correctly and the jewellery held in tweezers to avoid body heat. He wants to be able to distinguish between synthetic spinel and sapphire to be absolutely sure. I have asked him to bring in a parcel of his synthetic sapphires both loose and set so that we can do some experimenting. The question I asked was to firstly find out if 1mm round synthetic spinel are available, if not it would solve the problem and if they do then it would be beneficial to do a comparison. Fluorescent testing wasn't conclusive as the fluorescence was inconsistent.


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 Post subject: Re: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 10:10 am 
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Location: Halifax, Nova Scotia, Canada
Oh :) Well, I haven't been able to find any clear synthetic spinel myself, maybe someone else can answer.


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 Post subject: Re: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 11:54 am 
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Joined: Fri Jun 25, 2010 12:04 am
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Location: Idaho
With that kind of volume, you should be able to find someone in China, India, Thailand, or Sri Lanka who will cut colorless spinel or corundum to your specs... Corundum would be preferable - less likely to be damaged by tools in setting.

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 Post subject: Re: Synthetic colourless spinel
PostPosted: Tue Dec 08, 2015 12:57 pm 
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We do not have on stock syn. Spinel white but Dalloz Septmoncel France http://dalloz-dil.fr/ is having synthetic Spinel white 1,00mm in the program. I do not know if they are on stock available but in the pricelist they are noted.

The syn. Spinel rough is produced by Rubis RSA - a daughter company of the Dalloz Group.
New name: Dalloz Stones & Rough


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 Post subject: Re: Synthetic colourless spinel
PostPosted: Wed Dec 09, 2015 6:43 pm 
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Location: Monterey, CA
gemlab wrote:
These stones are so small that testing is difficult and doing some testing myself have found it pretty easy to separate CZ from synthetic sapphire or spinel if the instrument is used correctly and the jewellery held in tweezers to avoid body heat. He wants to be able to distinguish between synthetic spinel and sapphire to be absolutely sure.

Use your polarsicope or immerse it in methylene iodide.


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