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.
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21600 Location: San Francisco
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.
Joined: Wed Feb 20, 2008 1:13 am Posts: 33 Location: Phx, AZ
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.
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.
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.
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21600 Location: San Francisco
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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