1
$\begingroup$

enter image description hereenter image description hereenter image description hereenter image description here

A very dear man who love his job as a geologist gave this to me. He’s been all over the country so I have no idea where he may have picked it up

$\endgroup$

put on hold as off-topic by Jan Doggen, Fred, BillDOe, arkaia, trond hansen 3 hours ago

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, Fred, BillDOe, arkaia, trond hansen
If this question can be reworded to fit the rules in the help center, please edit the question.

2
$\begingroup$

The block is quartz. The green staining could be anything, from copper-bearing minerals, to clays, to silicates like epidote, actinolite, serpentine, etc.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.