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What could this be?
  
  Index -> What is it? - Where is it from?
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Aububa




Joined: 21 Mar 2022
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Location: San Martín de los Andes, Patagonia

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PostPosted: Mar 22, 2022 13:40    Post subject: What could this be?  
Found it on a random spot along a Patagonian lake shore, where black obsidian and common quartz are everywhere, and caught my attention. A friend of mine wants to break it, but I am not sure of that idea

IMG_20220321_234951893.jpg
 Mineral: Don't know
 Description:
Patagonia
12cm * 10cm
 Viewed:  2777 Time(s)

IMG_20220321_234951893.jpg
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Kevin Schofield




Joined: 05 Jan 2018
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Location: Beacon NY

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PostPosted: Mar 23, 2022 09:00    Post subject: Re: What could this be?  
Aububa wrote:
Found it on a random spot along a Patagonian lake shore, where black obsidians and common quartz are everywhere, and caught my attention. A friend of mine wants to break it, but I am not sure of that idea


It's a piece of black rock which at some point in geological time has fractured. The fractures filled with a white mineral.

Not much else to be said from a half-focused piece of rock with fractures...
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Volkmar Stingl




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PostPosted: Mar 23, 2022 12:17    Post subject: Re: What could this be?  
The "white material" is blue and could be chalcedony.
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Joseph DOliveira




Joined: 29 Jan 2012
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Location: Hanmer, Ontario

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PostPosted: Mar 23, 2022 13:47    Post subject: Re: What could this be?  
The picture is poor but on first impression, it looks very similar to the common blue opal found South of Tucson, Arizona.
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