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Fairfax Underground
Welcome to Fairfax Underground, a project site designed to improve communication among residents of Fairfax County, VA. Feel free to post anything Northern Virginia residents would find interesting.
Welcome to Fairfax Underground, a project site designed to improve communication among residents of Fairfax County, VA. Feel free to post anything Northern Virginia residents would find interesting.
I found an interesting stone
Posted by:
for a geologist
()
Date: October 15, 2017 05:23PM
I found it on a site where a bulldozer was digging up soil and large rocks, it is very heavy and dense, no air holes just a smooth surface with a black tar colored substance in spots on surface (fusion crust?). It has many tiny silver colored spots on and throughout the surface, metallic spots not crystal, there is no rust so it leads me to believe it might be nickel. You can feel the desity just by holding it, size of baseball and weight close to 5 pounds. Possible meteorite?
Re: I found an interesting stone
Posted by:
Very Interesting
()
Date: October 15, 2017 05:44PM
Did it look like this?
Attachments:
Attachments:
Re: I found an interesting stone
Posted by:
for a geologist
()
Date: October 15, 2017 05:47PM
Nothing like that, it doesn't have a shape like oblong or prolong. It has smooth surface but a shape like a stone with indentations. I've done a little research since I posted, no way is yours a meteorite.
Re: I found an interesting stone
Posted by:
Very Interesting
()
Date: October 15, 2017 05:54PM
Why don't you post a pic of the stone you found?
Re: I found an interesting stone
Posted by:
guessing
()
Date: October 15, 2017 05:58PM
maybe some kind of ultra-mafic mantle rock
Re: I found an interesting stone
Posted by:
Khhhcp
()
Date: October 15, 2017 06:11PM
If it tests positive for nickel it's almost certainly a meteorite.
Re: I found an interesting stone
Posted by:
for a geologist
()
Date: October 16, 2017 04:41PM
Khhhcp Wrote:
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> If it tests positive for nickel it's almost
> certainly a meteorite.
How do you do that? It has numerous metallic flakes and little rust, nickel does not rust so is it possible that the flakes are nickel / it attracts a magnet very nicely. I've heard that the "Nickel Detect" stuff they sell is not reliable on nickel iron alloys. Can I use sulfuric acid or muriatic acid to etch it? Thank you!
-------------------------------------------------------
> If it tests positive for nickel it's almost
> certainly a meteorite.
How do you do that? It has numerous metallic flakes and little rust, nickel does not rust so is it possible that the flakes are nickel / it attracts a magnet very nicely. I've heard that the "Nickel Detect" stuff they sell is not reliable on nickel iron alloys. Can I use sulfuric acid or muriatic acid to etch it? Thank you!