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A clue for this?
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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Ricardo Melendez




Joined: 21 Apr 2014
Posts: 63
Location: Estado de Mexico


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PostPosted: May 08, 2017 15:56    Post subject: A clue for this?  

Hi, I would like to know if anyone in the forum has a clue about what this is. I am very sorry for not making tests like streak or hardness, it is a really tiny unique piece, and I have no more to make tests.

The color is somewhat like the brookite.

It is from Zimapan, Hidalgo, Mexico, and associated with Calcite, Dolomite and Chalcopyrite.

This is the list of minerals described for this locality. Any ideas?

Acanthite
Adamite
Alamosite
Andradite
Anglesite
Arsenopyrite
Aurichalcite
Baryte
Bornite
Boulangerite
Brochantite
Calcite
Cerussite
Chalcanthite
Chalcocite
Chalcopyrite
'Chlorite Group'
Copper
Cosalite
Cubanite
Diopside
Epidote
Fluorite
Freibergite
Galena
Galenobismutite
Goethite
Grossular
Hematite
Hessite
Hidalgoite (TL)
Hydrobiotite
Hypersthene
Jamesonite
Litharge
Löllingite
Malachite
Marcasite
Massicot
Melanterite
Meneghinite
Mimetite
Minium
Molybdenite
Molybdite
Monticellite
Muscovite
Nepheline
Olivenite
Opal
var: Fire Opal
Plumbojarosite
Pyrargyrite
Pyrite
Pyromorphite
Pyrrhotite
Quartz
Realgar
Scheelite
Scorodite
Silver
Smithsonite
Sphalerite
Spurrite
Stannite
Tennantite
Tetrahedrite
Tremolite
'Unnamed (Mn-Pb Hydroxide)'
Vanadinite (TL)
Vesuvianite
Wollastonite
Wulfenite
Zinkenite
Zoisite



IMG_3015-s1.JPG
 Mineral: unknown
 Locality:
Zimapán mining District, Municipio Zimapán, Hidalgo, Mexico
 Dimensions: FOV about 10 milimeters
 Description:
 Viewed:  695 Time(s)

IMG_3015-s1.JPG


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vic rzonca




Joined: 18 Nov 2008
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Location: West Springfield, MA


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PostPosted: May 08, 2017 16:47    Post subject: Re: A clue for this?  

My guess, sphalerite.
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Jordi Fabre
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PostPosted: May 08, 2017 16:52    Post subject: Re: A clue for this?  

It looks like Vesuvianite
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crosstimber
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PostPosted: May 08, 2017 16:54    Post subject: Re: A clue for this?  

I agree. Vesuvianite.
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vic rzonca




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PostPosted: May 08, 2017 17:00    Post subject: Re: A clue for this?  

I withdraw my comment.
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Ricardo Melendez




Joined: 21 Apr 2014
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PostPosted: May 08, 2017 17:18    Post subject: Re: A clue for this?  

thanks, and indeed that idea round my mind also, look very like vesuvianite.

I know need to test but until get more specimens to test I will keep this untouch.

thanks again folks.
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marco campos-venuti




Joined: 09 Apr 2014
Posts: 141
Location: Sevilla


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PostPosted: May 08, 2017 18:15    Post subject: Re: A clue for this?  

I would say Enstatite.
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Bob Carnein




Joined: 22 Aug 2013
Posts: 58
Location: Florissant, CO

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PostPosted: May 08, 2017 19:56    Post subject: Re: A clue for this?  

This doesn't look tetragonal to me; I'd vote for epidote.
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