need help on an ID

[derek12261984]

Hi guys just wondering if someone could id a rock ive had since i was a kid. I originally found it near Dallas Tx

 

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[derek12261984]

Im thinking maybe iron ore but just not sure.

 

[derek12261984]

Here are a few moree pics. Anyone got any ideas?

 

[Brian T. Booth]

Here are a few moree pics. Anyone got any ideas? <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=933120"/> <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=933120"/> <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=933123"/><img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=933123"/>

Odd quartz specimen. With some hermitic staining. Cool little find.

 

[golden sluice]

Brian T. Booth, great call, on that specimen.

 

[MrLee]

Chalcedony, agate? looks like a giant fire agate without the fire.

 

[Brian T. Booth]

Chalcedony, agate? looks like a giant fire agate without the fire.

I would call it a quartz nodule. You have characteristics of agate, but also chalcedony. The way quartz sometimes "grows" is hard to define what specific type. Especially when they are both microcrystalline types of quartz.