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Post by fernwood on Dec 30, 2017 12:10:40 GMT -5
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Dec 30, 2017 15:55:25 GMT -5
I can see why you might think fossil bone. You may want to first narrow what is the material: try a droplet of muriatic acid (from the masonry or swimming pool supply dept. of your local Home Depot or Lowes) on one edge, and check for any bubbling. If it bubbles, it is probably marble or limestone, in which case the pitting may be the result of either boring marine organisms (sponges, piddocks, mussels, etc.) or acid-producing bacteria and weathering. I've also seen chalcedony and opalite display similar patterns on the sides or edges where they originally were in contact with host volcanic rock. Doesn't exclude bone, but these are alternatives.
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Post by fernwood on Dec 30, 2017 16:35:46 GMT -5
No bubbles, tried that. The surface shown in photo #7 (the second one posted) is very smooth.
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Dec 30, 2017 16:52:17 GMT -5
My guess is some kind of dolomite/dolostone.
Edit: Could be chert also.
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Post by Pat on Dec 30, 2017 16:52:21 GMT -5
The waxy melted areas remind me of common opal. Then there is the ghost in first photo...ðŸ¤
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Post by fernwood on Dec 30, 2017 17:12:03 GMT -5
Pat I saw the ghost as well. The smooth areas are kind of opalish.
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Post by MsAli on Dec 30, 2017 18:48:38 GMT -5
Have no clue what it is but its really neat Ghost in 1st, white dog/wolf in 2nd
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Post by rmf on Dec 31, 2017 13:08:55 GMT -5
it looks like chert. cany you make a cut and see of there is any color inside or just white.
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Post by fernwood on Jan 1, 2018 9:04:19 GMT -5
No way of cutting right now. The reddish and yellow areas appear t have some depth.
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jan 1, 2018 9:47:13 GMT -5
Looks like chert that I find in northern Minnesota.
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Post by fernwood on Jan 1, 2018 10:07:14 GMT -5
Have never found a "flowing" chert here before. They usually have very straight edges. Also, are not white. Interesting......
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nemesis21
noticing nice landscape pebbles
Member since August 2017
Posts: 88
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Post by nemesis21 on Jan 1, 2018 10:50:11 GMT -5
Have never found a "flowing" chert here before. They usually have very straight edges. Also, are not white. Interesting...... What do you mean by "flowing"? If you're talking about the polished side it's probably due to glacial/water activity. You could always try knapping a piece off to see what's inside .
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Post by fernwood on Jan 1, 2018 11:16:43 GMT -5
Flowing to me is a natural, very smooth surface, with rounded places. I am thinking this might have arrived via Glacial Lake Wisconsin. It is now in my "special stash", for when I have the needed equipment. Or, might keep it as a specimen, as it is very unusual for this area. Time will tell.
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