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Mysterious Red Pyramids in Mexican opal
  
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ahallenbeck




Joined: 19 Jan 2021
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PostPosted: Jan 20, 2021 19:28    Post subject: Mysterious Red Pyramids in Mexican opal  

Any idea what these pyramid structures that formed in opal are?

Video here:

https://www.youtube.com/watch?v=s_kPctch97k&t=3s

I am new to forum but will try to attach pictures too.

Any insight/comments appreciated much. Thank you.



20210119_211801.jpg
 Mineral: Unknown
 Locality:
Sonora, Mexico
 Dimensions: 14 x 11.8 x 6.8mm
 Description:
Magdalena, Sonora, Mexico
 Viewed:  1938 Time(s)

20210119_211801.jpg



20210119_212305.jpg
 Mineral: Unknown
 Locality:
Sonora, Mexico
 Dimensions: 14 x 11.8 x 6.8mm
 Description:
 Viewed:  1940 Time(s)

20210119_212305.jpg



20210119_211910.jpg
 Dimensions: 14 x 11.8 x 6.8mm
 Description:
 Viewed:  1939 Time(s)

20210119_211910.jpg



20210119_211623.jpg
 Mineral: Unknown
 Dimensions: 14 x 11.8 x 6.8mm
 Description:
 Viewed:  1937 Time(s)

20210119_211623.jpg


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Bob Harman




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PostPosted: Jan 20, 2021 20:28    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

Mexican opal????? Certainly interesting, but usually when it is "too good to be true, it usually is".

Unless a Mexican expert like Peter Megaw can vouch that the specimen is natural and genuine, I favor it being glass or hard clear plastic with inclusions, then facetted and polished.
To my untrained eye, it is not natural. BOB
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alfredo
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PostPosted: Jan 20, 2021 20:38    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

The red parts look hexagonal, so perhaps the tips of hematoidal quartz crystals? There is a lot of that where I was recently living in Catalonia.
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Volkmar Stingl




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PostPosted: Jan 21, 2021 00:12    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

alfredo wrote:
The red parts look hexagonal, so perhaps the tips of hematoidal quartz crystals?


I think the same.
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Riccardo Modanesi




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PostPosted: Jan 21, 2021 06:14    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

Hi to everybody!
Rutile and hematite inclusions are not to be excluded as well! Some opals contain these minerals as inclusion as well!
Greetings from Italy by Riccardo.

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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
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ahallenbeck




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PostPosted: Jan 22, 2021 22:12    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

Thank you for your response! I will look into that.
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ahallenbeck




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PostPosted: Jan 22, 2021 22:14    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

Thank you for your response! This specimen is from a top opal dealer from Mexico (close to Magdalena). He has sold opals for a long time and has never seen this before. It is real, but I understand your comment and do appreciate it. I tried to post a link from his original post but the spam filter rejected it; appending an exclamation mark after the www.? Anyway, thanks again and cheers from the Adirondacks!
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Michael Shaw
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PostPosted: Jan 23, 2021 09:34    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

ahallenbeck wrote:
I tried to post a link from his original post but the spam filter rejected it; appending an exclamation mark after the www.? Anyway, thanks again and cheers from the Adirondacks!


The non-commercial nature of the forum doesn't allow posting of links to commercial sites.
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Amir Akhavan




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PostPosted: Jan 23, 2021 15:33    Post subject: Re: Mysterious Red Pyramids in Mexican opal  

I agree with Bob that this could be artificial, some hard epoxy or the like.
You should get it tested.
Specific weight would help.

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Amir C. Akhavan, Hamburg, Germany
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