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Rock Identification
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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MarkG12




Joined: 10 Jan 2020
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Location: Oregon

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PostPosted: Jan 11, 2020 16:13    Post subject: Rock Identification  

Hello, new to this forum and was looking for some expertise on identifying some rocks I have. The first set of pictures are the ones I'm most curious about, and any help would be much appreciated. I know there some type of basalt/lava rock boulders but when you cut them open there are amazing different colors inside depending on the rock. I can't find much info on this anywhere. Is their opalized basalt? Thanks for any help.


rocks3.jpg
 Mineral: Basalt?
 Locality:
Oregon, USA
 Dimensions: various sizes up to large boulders
 Description:
 Viewed:  2977 Time(s)

rocks3.jpg



rocks2.jpg
 Mineral: basalt cut open
 Locality:
Oregon, USA
 Dimensions: 10 inches across
 Description:
 Viewed:  2978 Time(s)

rocks2.jpg



rocks4.jpg
 Mineral: Basalt cut open
 Locality:
Oregon, USA
 Description:
 Viewed:  2976 Time(s)

rocks4.jpg



rocks7.jpg
 Mineral: Basalt cut open
 Locality:
Oregon, USA
 Dimensions: 5 inches wide
 Description:
 Viewed:  2977 Time(s)

rocks7.jpg


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MarkG12




Joined: 10 Jan 2020
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PostPosted: Jan 11, 2020 16:34    Post subject: Re: Rock Identification  

This is a picture of the boulders before they are cut open to see what they look like on the outside. You can see the one in the foreground has the color of the inside peeking out the top.


rocks.jpg
 Mineral: Basalt?
 Locality:
Oregon, USA
 Dimensions: various sizes small to large boulders
 Description:
 Viewed:  2964 Time(s)

rocks.jpg


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MarkG12




Joined: 10 Jan 2020
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PostPosted: Jan 12, 2020 12:02    Post subject: Re: Rock Identification  

I was just wondering if I posted my pictures correctly, It says I have 80- plus views, but I don't see any responses with help Identifying these rocks. Just want to make sure I'm following correct procedures or posting the pictures in the right section for comment. They look like a type of Basalt/Lava rock but I'm new at this and didn't know lava rocks could be so colorful inside? Are these rare? Thanks for any help
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Josele




Joined: 10 Apr 2012
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PostPosted: Jan 12, 2020 12:33    Post subject: Re: Rock Identification  

Hello Mark, maybe you have no responses because often is not possible identifying rocks just seeing photos.
I don't know what these beautiful rocks are but to me they don't look like basalt.
You can look at the geological map of the zone where they were found and see what kind of rocks outcrop there.
If you give a more precise location maybe somebody who knows the zone can help.
Good luck!
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John Cesar




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PostPosted: Jan 12, 2020 12:38    Post subject: Re: Rock Identification  

Mark, this forum is for the mineral world not the lapidary world. I happen to like both of these worlds. Regardless, what you have is some nice agate and jasper. Being located in Oregon and showing sawed material I can't help but think you already know what material you have.
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Bob Harman




Joined: 06 Nov 2015
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PostPosted: Jan 12, 2020 12:45    Post subject: Re: Rock Identification  

Looks like colorful Oregon Obsidian. The smaller pieces with banding patterns might be called agates. Most of the colorful examples shown on Mindat come from the Glass Buttes area of Lake County Oregon.
Are your pictured examples from near that locality? BOB
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MarkG12




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PostPosted: Jan 12, 2020 13:15    Post subject: Re: Rock Identification  

Thank you for the responses, Just to give a quick explanation, I purchased a home in Oregon a year ago in the woods, I have always loved rocks/minerials, but never really was that knowledgeable about them. I was told by real estate agent the previous owner was an avid Rock hound for 50 plus years, and he passed away and everything was just left here, after a year of cleaning overgrown brush I'm left with literally tons of different rocks/minerials, you can see where he has been cutting slab pieces of these rocks over the years, most all buried in dirt and debris.there is so much material from already cut pieces to big boulders, which the pictures I posted, I thought were volcanic rock which sure look like it, but there all different colors inside, just trying to find a starting point to identifying these rocks. Maybe there would be a better forum for this purpose, any suggestions would be great, thanks again for everybody's time.
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rernst




Joined: 15 Apr 2019
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Location: Greenbelt MD

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PostPosted: Jan 13, 2020 08:56    Post subject: Re: Rock Identification  

I think your post brought a lot of clarity concerning your situation. I would suggest that you look around for a rock club in the area. It's likely that the previous owner was a member or someone in the club knows who they were, it's a small community. Much of what you have shown is nice material so hang on to it until you know more about what you have. Looks like you might have a new hobby.
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Bob Morgan




Joined: 18 Jan 2018
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PostPosted: Jan 13, 2020 13:45    Post subject: Re: Rock Identification  

I am certainly no authority on Oregon rocks having only visited there several times with in-laws, but one specimen looks to be Biggs picture stone and the next, the one with turquoise color might be a really nice piece of varicite,
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