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 Post subject: TSAVORITE?
PostPosted: Wed Feb 20, 2019 2:42 am 
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There are some special green garnet coming out from a place nearby Tamatave Madagascar now. The stones are very bright, yellowish green. But some green pcs after cutting looks like demantoid,very strong fire.
I check the specific gravity, something like 3.65


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 Post subject: Re: TSAVORITE?
PostPosted: Wed Feb 20, 2019 2:56 am 
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To separate Tsavorite = Grossular from Andradite = here demantoide you need a stronger magnet (neodym) - Demantoide jumps to the magnet, tsavo not.

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 Post subject: Re: TSAVORITE?
PostPosted: Wed Feb 20, 2019 8:32 am 
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Alternatively, you can take the RI in spot lecture, it will be within reading range for the tsavorite and over the limit for the demantoid.

I wonder if tsavorite has already be documented for Madagascar ?


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 Post subject: Re: TSAVORITE?
PostPosted: Wed Feb 20, 2019 11:13 am 
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Isi wrote:
I wonder if tsavorite has already be documented for Madagascar ?

Yes, there's a tsavorite garnet deposit in the south of Madagascar, close to the village of Gogogogo. It's well documented.


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 Post subject: Re: TSAVORITE?
PostPosted: Thu Feb 21, 2019 2:04 am 
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yes already documented since 2002 as I remember well:

https://www.gia.edu/gems-gemology/fall-2012-tsavorite-grossulars-adamo

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 Post subject: Re: TSAVORITE?
PostPosted: Thu Feb 21, 2019 7:35 am 
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Thank you. I didn't know.
The color doesn't look quite the same as the classical tsavorites from Tanzania. More Fe maybe.


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