Golden egg?

[Maine USA Beachcomber]

Hi.
Found this yesterday while picking up litter on a beach. It was among a large quantity of beach rocks washed up on the sand. I've been cleaning this beach daily for 5 years and never saw a golden metallic rock before. It's not magnetic - tried it on a heavy duty magnet.
It's quite heavy.
Any guess about what it could be?

 

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[Subterranean]

Possible meteorite? It would be worth it to have it tested by an expert. Sub

 

[Maine USA Beachcomber]

Thank you Subterranean. I posted it down i the meteorite thread and in that crazy big 'ask me what rock this is" thread. I can't think of what it could be washing in from the ocean. Doubt many ships carry brassy eggs lol.

 

[Broken knee]

It could be chalcopyrite with the brass/yellow color? Try a streak test it should leave a greenish black mark. HH
BK

 

[Broken knee]

This was the only pic I could find of a well worn sample of this material. This one being more gold in color. The the color will vary depending on where it was formed and the associated minerals when formed. HH
BK
The streak test it should leave a greenish black mark? Let us know the result please.

 

[kingskid1611]

Kidney stone from a whale. That would be what it would look like as it passed through the system.

 

[Maine USA Beachcomber]

It could be chalcopyrite with the brass/yellow color? Try a streak test it should leave a greenish black mark. HH
BK

Ok I did the test - there was a black mark at first but then no mark? And it's weird but it smelled kind of bad. Is it because of using the toilet lid?

 

[Maine USA Beachcomber]

That looks really close. Could be.

 

[Maine USA Beachcomber]

That might explain the smell.

 

[Broken knee]

Chalcopyrite is found in the Harborside and Brooksville area's in Maine. HH
BK

 

[Maine USA Beachcomber]

You may be right. Does it have a smell? Rubbing this gave off like burnt hair smell. Hard to describe. My hands smelled like it too.

 

[Maine USA Beachcomber]

Chalcopyrite is found in the Harborside and Brooksville area's in Maine. HH
BK

May be it. I wouldn't describe the odor as sour but it does have one per thishttp://www.sandatlas.org/chalcopyrite/

Someone else here said dolomite but I can't see that. You may be right.

 

[tamrock]

Sounds like a stink rock

 

[can]

Sounds like a stink rock

Thats funny

 

[Maine USA Beachcomber]

It could be chalcopyrite with the brass/yellow color? Try a streak test it should leave a greenish black mark. HH
BK

Been looking closer today. This one I have is covered w pits & dents. Also the rubbed area looks discolored. Does this fit w chalcopyrite?

 

[DCMatt]

It's a good thing there are some smart people posting here so we can all learn new stuff. I thought it had something to do with a brass monkey...

 

[Broken knee]

Been looking closer today. This one I have is covered w pits & dents. Also the rubbed area looks discolored. Does this fit w chalcopyrite?View attachment 1281308View attachment 1281307View attachment 1281306

Yes your rock is the same as the pic. I posted except the color. The color variation is due to environmental conditions when it was formed. HH
BK

 

[gunsil]

Looks like iron pyrite to me, one that has been well beach tumbled. I find a lot of it on some MA beaches. Iron pyrite will leave a black streak. Also known as fools gold.

 

[Maine USA Beachcomber]

So far I'm leaning towards Chalcopyrite but I can't even scratch it with a knife. Isn't Chalco softer? Been reading a lot about it. Could it be manmade from a shipwreck? Going to do a density test when I get a scale.

 

[Maine USA Beachcomber]

Yes your rock is the same as the pic. I posted except the color. The color variation is due to environmental conditions when it was formed. HH
BK

It's not magnetic - is iron pyrite magnetic?