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Re: Rocks & Minerals B/C 2017

Posted: August 1st, 2016, 10:53 am
by John Richardsim
Yep, your turn.

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 12:01 pm
by John Richardsim
Alright, for the sake of keeping this going:
[img]http://www.mindat.org/hpthumbs/HP_51835_800_602.jpg[/img]

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 1:06 pm
by Magikarpmaster629
John Richardsim wrote:Alright, for the sake of keeping this going:
[img]http://www.mindat.org/hpthumbs/HP_51835_800_602.jpg[/img]
Gypsum var. Selenite

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 1:11 pm
by John Richardsim
Magikarpmaster629 wrote:
John Richardsim wrote:Alright, for the sake of keeping this going:
[img]http://www.mindat.org/hpthumbs/HP_51835_800_602.jpg[/img]
Gypsum var. Selenite
Try a less wild guess.

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 2:07 pm
by azuritemalachite
Chalcedony? or at least a quartz?

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 2:15 pm
by John Richardsim
azuritemalachite wrote:
Chalcedony? or at least a quartz?
Is that a question or an answer?

...jk, yep, your turn.

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 2:22 pm
by azuritemalachite
I usually mix these two up...so just ID!
ImageImage
EDIT: One picture didn't work, so new picture for that one (but same specimen)!

Re: Rocks & Minerals B/C 2017

Posted: August 4th, 2016, 7:15 pm
by Magikarpmaster629
Top: Marble
Bottom: Quartzite

Re: Rocks & Minerals B/C 2017

Posted: August 5th, 2016, 1:50 pm
by azuritemalachite
Correct!

Re: Rocks & Minerals B/C 2017

Posted: August 5th, 2016, 6:32 pm
by Magikarpmaster629
While we're differentiating similar-looking specimens, how about these two (ID them)?
[img]http://img07.deviantart.net/7c9a/i/2013/271/7/8/rhyolite_porphyry_by_elfowl245-d6odkdy.jpg[/img]
and
[img]http://waynesword.palomar.edu/images2/PorAndesite1c.jpg[/img]