[Rockhounds] Unknown Oolitic?

[Jay Bates]

John, could you let us know what it is after you get the test results?  
I am very curious. I think the top layer is chalcedony according to your 
tests and the rest of it is something else, not calcite if it did not fizz.

John Siebel wrote:
> Jim,
>
> It's on it's way. Thanks!
>
> John
>
> ----- Original Message ----- From: "Jim Murowchick" 
> <murowchickj at umkc.edu>
> To: "Rockhounds at drizzle.com: A mailing list for rock and gem 
> collectors" <rockhounds at lists.drizzle.com>
> Sent: Friday, February 20, 2009 9:12 AM
> Subject: Re: [Rockhounds] Unknown Oolitic?
>
>
>> John,
>> If you'll send me a small chip, I'll run an XRD and refractive index
>> determination on it and positively settle the ID.  If you have two 
>> distinct
>> layers, a chip (1/8-1/4 inch would be enough, though more, the 
>> better) from
>> each would suffice.
>> Jim
>>
>> Dr. James B. Murowchick
>> Associate Professor, Geochemistry and Mineralogy
>> Department of Geosciences
>> University of Missouri-Kansas City
>> 5110 Rockhill Road  /  420 Flarsheim Hall
>> Kansas City, MO  64110
>> 816 235-2979   murowchickj at umkc.edu
>>
>>
>>
>>
>> On 2/19/09 8:05 PM, "John Siebel" <john at pandemoniumgraphics.com> wrote:
>>
>>> Further testing on this puppy reveals that the surface of this rock 
>>> is Mohs
>>> 7 while fractured (concoidal) inner rock is Mohs 3. Streak is either 
>>> white
>>> or nonexistant. Does not react to HCL. I'm voting botryoidal jasper 
>>> until
>>> someone talks me out of it.
>>>
>>> Thanks for all of your input - John
>>>
>>
>> -- 
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>
>