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21 Jan-00:12:54 Re: mysterious red pyramids in mexican opal (Volkmar Stingl)
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20 Jan-20:28:43 Re: mysterious red pyramids in mexican opal (Bob Harman)
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20 Jan-03:43:08 The mizunaka collection - quartz (Am Mizunaka)
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19 Jan-22:12:47 Re: schorl (Jim Wilkinson)
19 Jan-21:43:17 Re: synthetic rubies and shortwave uv (Rgangue)
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Identification Please
  
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Michelle Bacsik




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PostPosted: Dec 20, 2020 11:17    Post subject: Identification Please  

Thank you for this opportunity to ask a question. This was given to me by a friend. Aside from the pictures, the only other information I have is that she found it along the Duwamish River in Seattle, (specifically, South Park) Washington. Any input will be greatly appreciated!


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SteveB




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PostPosted: Dec 20, 2020 13:56    Post subject: Re: Identification Please  

Please start by reading the sticky post at the top of the forum about what is needed before you post an unknown for identification.

https://www.mineral-forum.com/message-board/viewtopic.php?t=1936
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Kevin Schofield




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PostPosted: Dec 20, 2020 15:45    Post subject: Re: Identification Please  

Michelle Bacsik wrote:
Thank you for this opportunity to ask a question. This was given to me by a friend. Aside from the pictures, the only other information I have is that she found it along the Duwamish River in Seattle, (specifically, South Park) Washington. Any input will be greatly appreciated!


Looks like a chunk of mica schist. Best expressed to the bottom right where you see the green-coloured rock with bright flecks.and white patches. The bright specks are mica, and white patches quartz.
The predominantly brown/white portion looks like vein quartz, somewhat iron-stained. It looks likely that this is the surface of a quartz vein along which the rock broke.

The tests suggested by Steve B should confirm the quartz.

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Bob Harman




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PostPosted: Dec 20, 2020 16:29    Post subject: Re: Identification Please  

Agree with KEVIN S.

Found in western Washington State your example will be an igneous or metamorphic rock, most likely a metamorphic mica schist, iron oxide stained, and with a quartz vein component.

A note to all respondents--We should be respectful and pleasant to all, especially newcomers around this holiday time. Happy holidays, Bob
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Michelle Bacsik




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PostPosted: Dec 20, 2020 21:01    Post subject: Re: Identification Please  

Thank you⁹ the direction, however I did read the information prior to posting my question. Unfortunately, I have very limited knowledge about minerals and what I do know, doesn't include the technical terms. I am here to educate myself on what I can by reading the dialogue between the other members and the experts, as well as look at the other sources this site has to offer. When I do have question, I am certainly not going to hesitate to ask.
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Michael Shaw
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PostPosted: Dec 21, 2020 09:48    Post subject: Re: Identification Please  

Bob Harman wrote:


We should be respectful and pleasant to all, especially newcomers around this holiday time. Happy holidays, Bob


not just around the holiday season - ALL of the time.
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Pete Richards
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PostPosted: Dec 21, 2020 10:08    Post subject: Re: Identification Please  

Michelle-

A suggestion for you and others who may be in a similar situation of not knowing, and not knowing how to start knowing. Try to get a copy of John Sinkankas' book Mineralogy (some editions are Mineralogy for Amateurs), either as a used book or in a library. This is an excellent book noteworthy for covering a lot of the "technical stuff" under the assumption that the reader brings no prior expertise. It is a classic, and some things are a bit dated, but as a place to start I can think of none better.

Good luck, good learning!

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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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Michelle Bacsik




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PostPosted: Dec 21, 2020 17:46    Post subject: Re: Identification Please  

My thanks to all of you who have offered great information! Happy Holidays!
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