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Can someone help identify this specimen?
  
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Todd Morgan




Joined: 27 Mar 2021
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Location: Portland Oregon

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PostPosted: Mar 27, 2021 02:09    Post subject: Can someone help identify this specimen?  

I will start by saying I have no idea where it was found. It was a gift from a friend.
I also am not sure what host rock the minerals are growing from.
There are 2 different minerals growing
1st is a small glassy mineral that is layered a translucent yellow with opaque white. Its about the size of a dime

The second is a dark purple almost gray mineral that looks similar to what bacteria would under a microscope. A pile of tiny worms lol. I hope the pictures are clear enough. Thanks



20210326082653_IMG_1018(1).jpg
 Mineral: Unsure
 Dimensions: 8"×5"
 Description:
 Viewed:  875 Time(s)

20210326082653_IMG_1018(1).jpg


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Mathias




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PostPosted: Mar 27, 2021 02:52    Post subject: Re: Can someone help identify this specimen?  

The light section in the middle looks like Opal.
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James Catmur
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PostPosted: Mar 27, 2021 13:04    Post subject: Re: Can someone help identify this specimen?  

The 'worms' could be chalcedony - both it and opal are varieties of Quartz
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Ed Huskinson




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PostPosted: Mar 27, 2021 19:36    Post subject: Re: Can someone help identify this specimen?  

Nice opal!! It looks like it occurs in a relatively basic volcanic rock, like a basalt
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