Very Heavy Rock (reposted)

[JCinNJ]

I reposted this since I noticed I posted the same picture twice. My apologies.

Found this rock years ago at the beach on the Jersey Shore. Before I picked it up, I thought it was a piece of coal or a piece of jetty rock. It is way way heavier than coal and much heavier even than jetty rock. I had thought meteorite but it is not magnetic, does not read on a metal detector and has what appears to be small white crystals here and there on it. I have tried many times to break off a piece of it but could not get the smallest chip off it with a small sledge hammer. I am reluctant to even consider sending the whole rock to a geology department or lab. Although it apparently is not metal it sure feels like metal. It is a little smaller than a man's fist. I took geology 101, historical and environmental geology in college but that was long ago. I never thought of bringing in the rock to the class back then. And I have looked at a million pictures online and have not seen one that looks like this. I am assuming it is probably metamorphic or perhaps igneous but it certainly is not sedimentary.

Any comments appreciated.

Thanks & HH!

- joe

 

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[Luca]

Hi, did you find out what it is? I found something very similar

 

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[happyincal]

i found one just like it today (3/20/2015). very heavy size of your pic and weighs close to a pound with silver specks all over it. Have you identified it yet?

 

[Luca]

Hi, can you post a picture of your rock?

 

[patgunn]

Hi There All
Hope you are all doing good.
I have a question for all of you if you don,t mind me asking one.
I found this strange rock some years ago and it has been bugging me since what it is.
Do any of you know what this rock is as i have no idea lol.
It weighs just under 400g or just under 1 pound, and fits in the palm of my hand.
I am baffled as it is not magnetic and is to small and heavy to be a regular rock.
It has iron iron pyrite and quartz on it, and is brown in coulor, with cracks and feels very strong
I would be thankfull for any ideas to what this rock could be, as of the strange heavy weight on it.
Thank.s all

Patrick.

 

[DDancer]

You'd do better to post your own thread with this but seeing as its your first post Welcome to the forum patgunn.
As to what your showing and the description its likely that its compressed microcline pyrite with quartz as your observing. Pyrites and quartz are often together with other minerals and added weight can come from other minerals and metals that are associated with ores like that. Copper, lead, gold and silver are some as well as their telluride's. No real way to confirm those minerals without a small assay.

 

[Johnnybravo300]

It looks very mineralized and probably full of pyrites and heavy metals which feel heavy. I'd crush and pan it. Probably full of pyrite or Galena.

 

[PinchedDreamer]

Ik this is an old thread, but I figured I'd ask before I posted my own thread.... Did you ever ID this? Did any of the responders have luck identifying their items? I have a piece that fits the same profile. Heavy.....I mean seriously heavy for its size, black on all sides but the bottom, and appears to be completely covered in shiny pieces of metal that mimic the sparkle of a bunch of tiny diamonds when they catch light.