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Ruby in Zoisite versus Ruby in Fuchsite

Posted by Kristi Hugs  
Ruby in Zoisite versus Ruby in Fuchsite
October 18, 2009 04:48PM
I am having a discussion with a friend on a specific piece. I say it is ruby in fuchsite, she says it is ruby in zoisite. To me, fuchsite is lighter with little mica sparkles while zoisite is a darker, almost emerald green with black spots (have no idea what the black spots are). Can anyone explain to me the major differences between ruby in zoisite and ruby in fuchsite? I know there is a chemical difference (found that on mindat.org) but how would one identify these properly? I think Fuchsite is softer than Zoisite......

Online, I see lots of vendors who are saying what they have is Ruby in Zoisite, but it is a light green to blue/green which I have always known to be fuchsite. How do you tell the difference?

Also, are there fake/fraudy pieces of this out there?

Any help is gratefully appreciated!
Re: Ruby in Zoisite versus Ruby in Fuchsite
October 18, 2009 05:17PM
No need for anyone to make fake pieces of this, I'd think, since the natural supply is abundant enough.

Fuchsite is a green mica variety, so it will be soft and flaky - If it's fuchsite, you should be able to break thin flakes off very easily with the point of a needle. Zoisite can be lots of different colours, so shade of colour is not a good guide to its identification. The zoisite which forms the massive matrix of the rubies from East Africa is usually light green. The black parts in that material are mostly an amphible.
Re: Ruby in Zoisite versus Ruby in Fuchsite
October 18, 2009 05:22PM
Thank you! I was almost sure that was the case, but if not 100% sure, i like to come to the experts :)
The reason for the fake question was because someone pointed out that the ruby in her specimen looked more like chips that were inserted.....:) I didnt really get that but it always is prudent to ask :)

thanks again!!
avatar Re: Ruby in Zoisite versus Ruby in Fuchsite
October 18, 2009 06:25PM
    
Kristi,
The material with the smaller ruby "chips" is the older material in general.
The newer stuff, maybe five or six years ago, has the bigger/better pieces of ruby.
Fun fact, tanzanite is a form of zoisite.
AK
Re: Ruby in Zoisite versus Ruby in Fuchsite
November 09, 2009 06:21PM
The matrix is translucent green zoisite with specks of black tschermakite.
avatar Re: Ruby in Zoisite versus Ruby in Fuchsite
November 09, 2009 07:53PM
Most of the ruby in fuchsite on the market is from southern India, and the color of the fuchsite is a lighter green than the zoisite that is mostly from Tanzania. Also the rubies in the fuchsite often are frequently surrounded by a thin layer of blue green kyanite.

Rock Currier
Crystals not pistols.
Re: Ruby in Zoisite versus Ruby in Fuchsite
November 11, 2009 01:55AM
Ya'll are the best! thank you!!
Zeng Zhouyu
Re: Ruby in Zoisite versus Ruby in Fuchsite
May 21, 2011 04:30AM
Ruby Zoisite,is from Tanzania,Apple-green zoisite and Red Corundum,with black amphibole
but ruby fuchsite is from India,Yellow-green fushite (mica) with red Corundum.the rough stone is a slice and chip,not a block.
it is different~~
our factory make the two stone to export many kinds of beads,spheres,eggs,and pendants, cabs....
Just I had a working visit for the ruby fuchsite mine in india.
Re: Ruby in Zoisite versus Ruby in Fuchsite
May 25, 2011 08:40PM
hi dont forget than it could be ruby in green kyanite too .bye
Re: Ruby in Zoisite versus Ruby in Fuchsite
September 06, 2011 03:02PM
This is what they are calling Ruby in Zoisite from India. Isnt this Ruby in Fuschite???
Attachments:
open | download - rubyzoisite wand.jpg (79.1 KB)
avatar Re: Ruby in Zoisite versus Ruby in Fuchsite
September 07, 2011 11:45AM
Yes, its in Fuschite. In the Indian material, the ruby often has little rims of bluish green kyanite around the rubies as I see in this piece.

Rock Currier
Crystals not pistols.
Re: Ruby in Zoisite versus Ruby in Fuchsite
October 10, 2011 04:13AM
Does anyone here know if ruby can occur in serpentine? Thanks.
avatar Re: Ruby in Zoisite versus Ruby in Fuchsite
October 10, 2011 10:59AM
Corundum can occur the contact of ultramafics (eg serpentinites) and aluminous rocks, but I have not seen it within serpentinite.

Regards,
Ralph
jgb
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 03:06AM
Fuschite is a type of mica (variation of Muscovite)

Zoesite is a very different mineral (the most valuable form is Tanzanite)

The black in the Ruby/Zoesite (also known as Anyolite) is Hornblende
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 03:23AM
    
Looks like a healy feely thingy, that could be made of any compressed material, of course it's fully loaded with supernatural powers, that's a given winking smiley
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 07:44AM
Serpentinites are almost always poor in aluminium. The little Al there is will be taken up by chlorite, amphiboles and (even, to a small extent) pyroxenes. So, yes, no corundum within serpentinites. However, corundum is quite typical in contact rocks between serpentine/peridotite (think of serpentinite as a hydrated peridotite) and adjacent rocks (granites, gneisses, amphibolites and others). In those cases, serpentinites are the source for the chromium that is responsible for the ruby color.
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 02:01PM
John,

Can you direct me to a paper confirming that the dark xls in the green African zoisite / ruby specimens are truly tschermakite? This would be valuable news for the amphibole challenged such as myself.

No surprise, but EDS shows a little chromium in the green zoisite.

Bart
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 05:29PM
Bart,
There's some basic information in a 1954 paper in the Mineralogical Magazine. You can download it here:

[rruff.geo.arizona.edu]

The paper focusses on the zoisite but offers some basic information on the amphibole.
Hope this helps,
Andy
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 09:02PM
Thank you Andy.

I was hoping for a much newer reference, but I will obtain the article and review it.

Might be fun to track the history of tschermakite.

I bought a tschermakite grain from Harvard back when they were offering probe standards for oxygen analysis. The grains were good for all of the other constituents.

I'll compare the spectra.

Bart
Re: Ruby in Zoisite versus Ruby in Fuchsite
February 27, 2012 09:09PM
Some of this "tschermakite" has also been sold as "aluminotschermakite" - Not sure whether the latter ever went through a proper submission and approval or is just one of the "named" amphiboles?
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