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23 Jul-00:46:05 Re: sainte marie-aux-mines show 2018 (Roger Warin)
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22 Jul-04:22:19 Re: collection of heimo hellwig (Heimo Hellwig)
22 Jul-00:41:13 Re: sainte marie-aux-mines show 2018 (Roger Warin)
21 Jul-14:56:49 Re: glass or something else? (James)
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21 Jul-00:19:50 Re: glass or something else? (Justin Hickok)
20 Jul-21:47:30 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-21:35:47 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-21:23:43 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-16:14:13 Re: glass or something else? (Vic Rzonca)
20 Jul-14:12:47 The mizunaka collection - orthoclase (Am Mizunaka)
20 Jul-13:25:34 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Peter Lemkin)
20 Jul-11:59:54 Re: glass or something else? (Justin Hickok)
20 Jul-11:09:23 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Justin Hickok)
20 Jul-11:08:35 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Justin Hickok)
20 Jul-00:28:07 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-00:20:30 Re: sainte marie-aux-mines show 2018 (Roger Warin)

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What mineral is this?
  
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migocaceus




Joined: 02 Apr 2018
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PostPosted: Apr 03, 2018 22:55    Post subject: What mineral is this?  

I have this small specimen of mineral someone gave me, but I am very much an amateur so I can't figure out what it could be. I have no idea where it originated from, but I've tried to streak it and got nothing noticeable (possibly white but definitely no discernible streak). A friend said it could be Augite or Diopside but I'm not sure, as the pictures I've found on the internet don't look much like this mineral.

One of the sides (the right image) has a somewhat reddish bit that looks to me like iron, but I'm unsure if this means anything since I'm really new to minerals.

Any thoughts?



Side Profile.jpg
 Description:
Unknown
1.75 cm x 1 cm
 Viewed:  730 Time(s)

Side Profile.jpg



topview.jpg
 Description:
Unknown
1.75 cm x 1 cm
 Viewed:  730 Time(s)

topview.jpg


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Tobi




Joined: 07 Apr 2009
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Location: Good Old Germany


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PostPosted: Apr 03, 2018 23:43    Post subject: Re: What mineral is this?  

This could be Obsidian ( https://www.mindat.org/min-8519.html ).
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Kevin Schofield




Joined: 05 Jan 2018
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Location: Houston TX

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PostPosted: Apr 04, 2018 07:22    Post subject: Re: What mineral is this?  

Tobi wrote:
This could be Obsidian ( https://www.mindat.org/min-8519.html ).


I'm with Tobi given these pictures. That fractrue pattern and glassy lustre looks like obsidian to me too

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