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 Post subject: Stone ID
PostPosted: Wed Feb 20, 2008 10:22 pm 
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Hello All, new guy here :)
I was wondering if any of you knew what this was?
it looks like rutilated quartz... but Im not sure.

I got it at the Tucson Gem Show (since I live in Phoenix) and this is the only one I dont know what it is.
Other cabs I got were Jade and Moss Agate.

Any help is appreciated.

Image
Image[/img]


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PostPosted: Thu Feb 21, 2008 6:40 am 
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we'll need some data, Mag.


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PostPosted: Thu Feb 21, 2008 11:14 am 
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There are several things this could be, all of which would be impossible to identify from a photo.


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PostPosted: Thu Feb 21, 2008 11:24 am 
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Well unfortunately I dont have the tools to give you much more information.
Unless what I can do is through eyeballing it.


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PostPosted: Sun Feb 24, 2008 12:00 pm 
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Mag wrote:
Well unfortunately I dont have the tools to give you much more information.
Unless what I can do is through eyeballing it.


That's the problem though in all sincerity. You can't do scientific gemological evaluation without the tools and the training to use them. Anything anyone would offer in the way of an ID from your pic would be no more than a guess.

You may well be able to find a local gemologist or rock-hound who could help you out. 8)

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PostPosted: Sun Feb 24, 2008 2:57 pm 
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Yeah, and its not exactely worth it to get it ID'd at a place..
but I am open to your suggestions and guesses as to what it is :)

thanks


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PostPosted: Sun Feb 24, 2008 3:05 pm 
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It would be irresponsible of us to guess at something blindly.

Contact a local Gem & Mineral Society or Geology Department at a local college or university and ask if there is someone there that would be willing to help you identify your stone.
Good luck.


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PostPosted: Sun Feb 24, 2008 3:22 pm 
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Barbra Voltaire wrote:
It would be irresponsible of us to guess at something blindly.


I dont see how, not in this case anyway.
its certainly not a high-end stone or even moderately expensive. It cost me $2.50 at the gem show.


Barbra Voltaire wrote:
Contact a local Gem & Mineral Society or Geology Department at a local college or university and ask if there is someone there that would be willing to help you identify your stone.
Good luck.


I'll ask my friend who's a Geo major here at the University.
if not, then I'll see if he knows anyone who can.


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PostPosted: Sun Feb 24, 2008 3:45 pm 
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Since you're in Phoenix you might also want to try:
http://www.azminerals.com/ClubInfo.htm

Gem & Mineral Clubs usually have very helpful members.


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PostPosted: Sun Feb 24, 2008 4:57 pm 
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Mag,
Since you understand this is a guessing game with no determinative testing results applied and no apparent value consideration beyond what you paid for the cab, I'll guess based strictly on the photos.

We trust you'll inform us when you've had an authoritative ID made.

From your photos, it appears as a grayish green translucent cab under fluorescent lighting. It appears to have a waxy luster with a large granular fracture on the dome. It has a mottled appearance.

I'd guess a non-chalcedonic aggregate. Perhaps, serpentine. But this does not rule out other low grade aggregates with similar color and visual characteristics.

The one thing I'm quite confident in saying is, it's not rutilated quartz per your original post.


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PostPosted: Sun Feb 24, 2008 5:14 pm 
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Barbra Voltaire wrote:
Since you're in Phoenix you might also want to try:
http://www.azminerals.com/ClubInfo.htm

Gem & Mineral Clubs usually have very helpful members.


Thanks Barb.
You actually reminded me about my friends friend, who is one of the founders of a little geology club here (I actually attend University in Flagstaff, north of Phoenix) but anyways, I think he might know or have some idea.

I'll get input from him.

JB wrote:
Mag,
Since you understand this is a guessing game with no determinative testing results applied and no apparent value consideration beyond what you paid for the cab, I'll guess based strictly on the photos.

We trust you'll inform us when you've had an authoritative ID made.

I'd guess a non-chalcedonic aggregate. Perhaps, serpentine. But this does not rule out other low grade aggregates with similar color and visual characteristics.

The one thing I'm quite confident in saying is, it's not rutilated quartz per your original post.


I didnt think it was rutilated quartz too much, but the streaks on the bottom made me think it could have been,
Thank you for your input.
I will certainly reply back when Ive asked around.


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PostPosted: Tue Feb 26, 2008 4:20 pm 
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Since we're guessing... any chance it's prehnite? The cloudiness looks familiar...


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PostPosted: Tue Feb 26, 2008 7:52 pm 
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If I were to guess (as iresponsible as it appears)....I might suggest Mexican onyx, which is a misnomer for a variety of banded calcite (of stalagmitic origin).


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PostPosted: Wed Feb 27, 2008 4:26 pm 
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Thanks.
Im having that guy check it out today.

Meanwhile, I took 2 new pictures of it.

Image

Image


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PostPosted: Wed Feb 27, 2008 4:37 pm 
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Since we're guessing, I'll say Serpentine. Looks kind of waxy in the pics.

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