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Post by montanasky on Apr 11, 2011 0:25:43 GMT -5
Hello,Im new to the Group and new to Rock Hounding but I can do it all day long! I have some really neat things....I may be a "Natural" or a Natural Disaster!!!!!! Im Montana in Colorado and have been racking my Brain,my computer and ruining my Brain cells and eyes trying to read and study!!!!!!!!!!!!!!!! Yuk! I need help with these Rocks...I have some really neat and colorful stuff........and I do know I have lots of Black Obsidian...but I also have found green snowflake etc. Help? I Think These rocks may be a real Geological find? I can send more pics on request! Attachments:
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Post by romare on Apr 11, 2011 6:21:39 GMT -5
What environment did they come from? They very much look to be a vitreous slag from a blast furnace. I picked up a lot of that when I was a kid in AL from the railroad rights of way.
Mark
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Post by Ryan on Apr 11, 2011 15:58:46 GMT -5
Doesa obsidian have pores and vacuoles like that?
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Post by nose2ground on Apr 11, 2011 16:08:33 GMT -5
not an expert by no means, but conchoidal fracture patters are evident - judging from the outer layer of rock, i would be inclined to say some sort of chert/agate?
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Post by colorshapetexture on Apr 11, 2011 17:26:38 GMT -5
That looks like it could go either way from the photos.
Where did you find it?
That color and texture. Sure looks like iron slag.
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