Identification Help

[KWhite]

Hello all,

We found this rock and can't seem to identify it.

1. Non-magnetic
2. Does not leave a red streak on ceramic tile
3. Leaves little to no marking during the test. Just a faint black mark.
3. Grooved tile when performing the streak test
4. Approximately 1.8lbs
5. Found in Florida
6. Black in color

What do you all think it can be?

 

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[Eu_citzen]

Will a knife scratch it?

 

[KWhite]

Will a knife scratch it?

No, a knife wouldn't scratch it. Metal fragments came off of the knife, but no scratch to the rock at all. Same with a metal file. Thoughts?

 

[IAMZIM]

I'm not sure but it kind of looks like it could be basalt, which does in fact leave a black or gray streak. Do I see a spot that may have had barnacles on it at one time? Could it have been some ship ballast that was dumped long ago?

 

[stdenis_jd]

I'd venture a wild guess at black chert, that's the best I've got
the fracture and luster looks the same as any chert I've found here in MI but most of ours is from off-white to gray to yellow but I know some areas have black...

 

[KWhite]

I'd venture a wild guess at black chert, that's the best I've got
the fracture and luster looks the same as any chert I've found here in MI but most of ours is from off-white to gray to yellow but I know some areas have black...

In this lighting it appears grey, but in person it is solid black. When I did a google search for visually similar images, it came back meteorite. It looks similar to basalt, but up close it is different. I've attached three more pictures of the other side and the broken piece.

 

[KWhite]

I'm not sure but it kind of looks like it could be basalt, which does in fact leave a black or gray streak. Do I see a spot that may have had barnacles on it at one time? Could it have been some ship ballast that was dumped long ago?

I don't see a spot where there might have been barnacles.

 

[Rific]

I second stevens on the chert

 

[Eu_citzen]

Chert, or perhaps even flint seems possible. The black streak is odd though. Chip an edge and show us the fresh surface.

 

[Tpslegacy]

Hey people ,

I found this a year ago on the Oregon coast lots of cool colores some translucent some opec jasper /carnelian agate is what I'm guessing what ever it is it's a find of a life time !!

 

[MartyRocks]

Welcome Tpslegacy,

You should have started a new thread... so people can comment just about your rock!

take care,

Marty