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Michelle Bacsik
Joined: 20 Dec 2020
Posts: 3
Location: Seattle
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 Posted: Dec 20, 2020 11:17 Post subject: Identification Please |
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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
Joined: 12 Oct 2015
Posts: 238
Location: Canberra
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Kevin Schofield
Joined: 05 Jan 2018
Posts: 169
Location: Beacon NY
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| Posted: Dec 20, 2020 15:45 Post subject: Re: Identification Please |
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| 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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Veni, Vidi, Emi |
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Bob Harman
Joined: 06 Nov 2015
Posts: 765
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| Posted: Dec 20, 2020 16:29 Post subject: Re: Identification Please |
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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
Joined: 20 Dec 2020
Posts: 3
Location: Seattle
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| Posted: Dec 20, 2020 21:01 Post subject: Re: Identification Please |
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| 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
Site Admin
Joined: 30 Apr 2008
Posts: 2226
Location: Oklahoma
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| Posted: Dec 21, 2020 09:48 Post subject: Re: Identification Please |
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| 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
Site Admin
Joined: 29 Dec 2008
Posts: 842
Location: Northeast Ohio
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| Posted: Dec 21, 2020 10:08 Post subject: Re: Identification Please |
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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!
_________________
Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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Michelle Bacsik
Joined: 20 Dec 2020
Posts: 3
Location: Seattle
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| Posted: Dec 21, 2020 17:46 Post subject: Re: Identification Please |
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| My thanks to all of you who have offered great information! Happy Holidays!
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