7 pound rock

[Blackfoot58]

I’ve been posting about a large rock that I now have permission to get. It’s in a field that was frozen and now is soupy mud.
I “visited” it today. I was able to retrieve this smaller rock that was closer to the road.
It weighs in at 7 pounds. It has a heavy attraction to a magnet. When wet, it is very black in appearance. I can see some very small crystal reflections on it. Maybe magnetite (?). I’d say around 7 for Mohs scale. This photo was before cleaning.

The final version. Any ideas as to type?
Thanks

 

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[ConceptualizedNetherlandr]

Are you thinking the density is unusually high? Take your best guess at the average diameter and calculate the spheroidal volume. Then calculate approximate density . Then get back to us

 

[Blackfoot58]

Are you thinking the density is unusually high? Take your best guess at the average diameter and calculate the spheroidal volume. Then calculate approximate density . Then get back to us

I wasn’t really concerned with the density per se. Just curious as to what type of rock it is. I’ll figure the density tomorrow. Thanks.👍🏼

 

[Chilli]

Magnetite?
If you are game to crack it open it'd hugely help to identify it.
Looks similar to this on searching.
You can scroll through the pictures of it without needing to go into Reddit.

 

[Armchair detective]

Are you thinking the density is unusually high? Take your best guess at the average diameter and calculate the spheroidal volume. Then calculate approximate density . Then get back to us

Better would be to dunk in a bucket of water. Measure the additional height, dia bucket, calculate, then get back to CONCEPTUALIZED ETC.

 

[metalman2024]

I’ve been posting about a large rock that I now have permission to get. It’s in a field that was frozen and now is soupy mud.
I “visited” it today. I was able to retrieve this smaller rock that was closer to the road.
It weighs in at 7 pounds. It has a heavy attraction to a magnet. When wet, it is very black in appearance. I can see some very small crystal reflections on it. Maybe magnetite (?). I’d say around 7 for Mohs scale. This photo was before cleaning.View attachment 2195138
View attachment 2195139
The final version. Any ideas as to type?
Thanks

was gonna say, I see the first photo with green patches leading me to believe it's jade but then again you say it's a black rock after wetting

 

[Blackfoot58]

Magnetite?
If you are game to crack it open it'd hugely help to identify it.
Looks similar to this on searching.
You can scroll through the pictures of it without needing to go into Reddit.

Thanks Chilli. That definitely looks like mine. I’ll research my area for those types being available.👍🏼

 

[Chilli]

Thanks Chilli. That definitely looks like mine. I’ll research my area for those types being available.👍🏼

Good one. Hopefully you get a positive id. My misses is always picking up different rocks when she comes out with me. Rocks, odd shaped bits of wood. It's an interesting thing really.

 

[ToddsPoint]

It’s igneous, intrusive, and mafic. Possibly ultra-mafic. Diabase, diorite, peridotite, and gabbro come to mind. Mafic rocks are low in silica and rich in magnesium and iron, thus attracted to a magnet. Gabbro usually has larger grains and diorite is usually more speckled. I’ll go with DIABASE.

 

[Silvermonkey]

It’s igneous, intrusive, and mafic. Possibly ultra-mafic. Diabase, diorite, peridotite, and gabbro come to mind. Mafic rocks are low in silica and rich in magnesium and iron, thus attracted to a magnet. Gabbro usually has larger grains and diorite is usually more speckled. I’ll go with DIABASE.

Wow! There are some really smart folks on this site. WTG ToddsPoint!