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inclusion in agate from Juchem quarry, Idar-Oberstein

Posted by Ferdinando Giovine  
inclusion in agate from Juchem quarry, Idar-Oberstein
May 28, 2012 06:47PM
I have this nice pink agate from Juchem Quarry, Idar-Oberstein, Hunsrück Mts, Rhineland-Palatinate, Germany, found 2002 with a funny fan-shaped unknow inclusion. What is?
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open | download - Agata rosa con inclusione, Juchem Quarry, Idar-Oberstein, Hunsrück Mts, Rhineland-Palatinate, Germany. found 2002.jpg (94.3 KB)
open | download - Agata rosa con inclusione, Juchem Quarry, Idar-Oberstein, Hunsrück Mts, Rhineland-Palatinate, Germany, found 2002, foto 2.jpg (117.1 KB)
avatar Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 28, 2012 06:48PM
ca    
Goethite?
avatar Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 28, 2012 06:55PM
I'm not sure of the associated minerals in that part of Germany, but it is not unusual to have sagenite inclusions that exhibit the same radial spray pattern in agate.
Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 28, 2012 08:43PM
at    
aragonite in agate is well documented from juchem, i think this could be correct.
avatar Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 29, 2012 12:49AM
ca    
Thanks Gerhard
Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 29, 2012 06:03AM
Is it possible baryte?
avatar Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 29, 2012 06:27AM
de    
It actually IS mostly chalcedony, because the material is usually largely replaced. Aragonite is much more likely: this has been documented from a number of agate localities within the Hunsrück range and Rhenish Hesse (the foothills to the southeast). I can't remember though whether baryte has ever been confirmed.
avatar Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 29, 2012 07:50AM
nl    
Some years ago (5/6 years?) there was something in Lapis magazine about a confirmed Baryte find in Juchem quarry.
They were Baryte crystals in a geode though. I found small Baryte crystals in nearby Vollmersbach quarry in 2005.
In this case however I think Peter and Gerhard are right. It looks lake a Chalcedony replacement of Aragonite.

Something about the Sagenite Paul mentioned. Agate collectors call anything acicular included in an agate "Sagenite". Usually it's Aragonite, but also other needle like minerals can be given this name. I've never seen real Rutile sagenite in an agate though. So, Sagenite, when it is mentioned in the agate collectors community, is a rather fuzzy word winking smiley

Cheers,

Harjo
Re: inclusion in agate from Juchem quarry, Idar-Oberstein
May 29, 2012 12:08PM
I total agree that now it is chalcedony.
ok for aragonite
Thank to everyone
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