I have no idea what this type of rock is, but it has been in the family attic for 100+ years. Probably nothing but it is heavy and I am curious. Thoughts?
Thanks for any feedback!
Cal...
Thanks for any feedback!
Cal...
I have no idea what this type of rock is...

I took it for granite.I have no idea what this type of rock is, but it has been in the family attic for 100+ years. Probably nothing but it is heavy and I am curious. Thoughts?
Thanks for any feedback!
Cal...

I want to thank everyone for their feedback. I just added a few more pics. Blue light pics up some specks.I have no idea what this type of rock is, but it has been in the family attic for 100+ years. Probably nothing but it is heavy and I am curious. Thoughts?
Thanks for any feedback!
Cal...
Could you share the general region you're located? When you say blue light I assume you mean that's a UV light? And make sure the specimen is clean before hand otherwise you might just be picking up contaminants from the environmentI want to thank everyone for their feedback. I just added a few more pics. Blue light pics up some specks.
Cheers!
Thanks for your reply. I'm located in Northeast US - NY / PA. I did use UV light. It also has streaks of shiny silver in the rock. No magnetism I can detect.Could you share the general region you're located? When you say blue light I assume you mean that's a UV light? And make sure the specimen is clean before hand otherwise you might just be picking up contaminants from the environment
You might have some bits of Franklinite in that rock then!Thanks for your reply. I'm located in Northeast US - NY / PA. I did use UV light. It also has streaks of shiny silver in the rock. No magnetism I can detect.
Cheers! Cal...
Thanks again for your feedback. No matter what, I really love the look and feel of the rock and the fact it was tucked away in a locked box in the family attic.You might have some bits of Franklinite in that rock then!
You're in the right area (New Jersey) for that mineral which is a pretty neat find. Without physical examination it is really impossible to say for certain.