Green Rock.

Goldminer · Jan 30, 2012

Found this in my driveway while I was walking across the street to detect an old farm house. What made this stand out is I have crushed rock 3/4" minus delivered and the rock is Grey. I noticed this in the gravel, its Green with traces of what appears to be Quartz?? Any rockhounds out there that might know what type of rock this is besides a Green one :laughing:

. Measures about 3" x 2" and appears to be water worn.

bruinvikes · Jan 30, 2012

hmm, not sure, but it is cool though!

fred sanford · Jan 30, 2012

Serpentine

It may be serpentine . Not common . It is where I live though. Word has it, it was formed in ancient sea beds. There is a couple of spots here in Pa . where the earths crust has opened just right to expose some out crops. I tumbled a bunch of it and looks nice polished. Just my guess.

Goldminer · Jan 30, 2012

fred sanford said:
It may be serpentine . Not common . It is where I live though. Word has it, it was formed in ancient sea beds. There is a couple of spots here in Pa . where the earths crust has opened just right to expose some out crops. I tumbled a bunch of it and looks nice polished. Just my guess.

Thanks Fred, I'm going to have it polished am sure it will look nice.

RingNut · Jan 31, 2012

Could also be a mineral called Malachite. If it polishes up a more brilliant green then I would lean toward Malachite especially if you see any traces of copper in the quartz after tumbling. If it stays the deep green as pictured then serperpentine as previuosly mentioned is a good guess. I think there is also a green tourmaline, but I'm not sure. It should polish up nicely though.

TonyAZ · Jan 31, 2012

Rock

Kryptonite--!!!!!!!!!!!!!!!!yikes----superman .

Goldminer · Feb 1, 2012

TonyAZ said:
Kryptonite--!!!!!!!!!!!!!!!!yikes----superman .

Thats strange, found this hanging in a tree next to the rock :laughing:

IMShooter · Feb 2, 2012

possibly float copper? can't tell from the pics (slightly blurry), but we find quite a bit of oxidized copper with quartz up here.

Thatsit · Feb 2, 2012

It also can be Adventurine when polished looks like that with mixed quartz.

Here is some unpoloshied Adventurine

Green Rock.

Goldminer

Senior Member

Attachments

bruinvikes

Elite Member

fred sanford

Elite Member

Goldminer

Senior Member

RingNut

TonyAZ

Elite Member

Goldminer

Senior Member

Attachments

IMShooter

Elite Member

Thatsit

Similar threads