[Rockhounds] Unknown Oolitic?

[Jay Bates]

Mostly likely it is a travertine coating on botryoidal calcite.

Jay Bates wrote:
> I seems to me whatever you are scratching is calcite. Maybe a calcite 
> coating on the underlying material which could be jasper/agate.
>
> Wayne Rasmussen wrote:
>> John,
>>
>> It seems to me that is a Botroidal Jaspagate,  nice specimen at that.
>>
>> Wayne
>>
>> ----- Original Message ----- From: "John Siebel" 
>> <john at pandemoniumgraphics.com>
>> To: "Rockhounds at drizzle.com: A mailing list for rock and gem 
>> collectors" <rockhounds at lists.drizzle.com>
>> Sent: Wednesday, February 18, 2009 11:33 PM
>> Subject: [Rockhounds] Unknown Oolitic?
>>
>>
>>> Yo List,
>>>
>>> I've got a specimen here, one of many I have failed to label in the 
>>> field. I can be such a jerk. My assumption is that this puppy is 
>>> from somewhere between Portland, OR and Tillamook, OR.  Julie thinks 
>>> that we found a volcanic "Bomb" at the same site and wants to call 
>>> this, "Ooltic Lava." I'm thinking, "Botroidal Jasper" but a scratch 
>>> test gives me a hardness of 3. Anyone have a clue?
>>>
>>> http://www.flickr.com/photos/31394106@N08/3291566447/
>>>
>>> Thanks - John
>>>
>>> -- 
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>>
>>
>