3
$\begingroup$

I'm 99% sure I got it in California on base while walking near the airstrip so it could have come from litterly anywhere. I can't seem to break any pieces off. It's kinda heavy for its size and hard. It's smooth to the touch, even in the uneven spots.it has chunks of light blue- blue green all over. The mineral around the blue is brown, and in some spots, clear.

enter image description here

enter image description hereenter image description here

$\endgroup$
  • $\begingroup$ Can you post a clearer picture and add something for scale? $\endgroup$ – g.z. Jul 20 '18 at 2:44
  • 1
    $\begingroup$ Is that good??? $\endgroup$ – Damagedpanic Jul 20 '18 at 3:13
  • $\begingroup$ This is much better! That being said, I still don't know what it is :( $\endgroup$ – g.z. Jul 20 '18 at 5:11
  • $\begingroup$ Please follow this guide adding as much information as you can. $\endgroup$ – gerrit Jul 20 '18 at 11:31
1
$\begingroup$

Your rock is most likely chalcedony, cryptocrystalline form of quartz. Luster matches that of quartz asdoes the small fracture patterns along the upper right edge in the second photo. The color maybe due to trace material like microscopic rutile crystals within the chalcedony. Microscopic rutile can give a bluish grey to quartz.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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