Mystery round spots in quartz??

braat
spending too much on rocks

Member since December 2016
Posts: 350

Mystery round spots in quartz?? May 10, 2019 21:25:16 GMT -5 Pat, rockjunquie, and 1 more like this

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Post by braat on May 10, 2019 21:25:16 GMT -5

This morning I was rockhounding the local river and came across this guy... anybody got any ideas what caused the round white parts?? The rock looks like it's quartz other than the white parts so I'm guessing and hoping it will tumble nice after I cut it up. The rock is shown wet and is 5 X 4 inches. Second photo is the rock flipped over.

Glen

greig fully equipped rock polisher Member since August 2016 Posts: 1,703	Mystery round spots in quartz?? May 10, 2019 22:12:44 GMT -5 braat likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by greig on May 10, 2019 22:12:44 GMT -5 My first thought was Petoskey stone, but you are in the wrong part of the country. I am therefore guessing a conglomerate.
	Yes, I am MeMiner on Youtube ;-)

rockjunquie Global Moderator Member since March 2012 Posts: 34,924	Mystery round spots in quartz?? May 11, 2019 21:56:10 GMT -5 braat likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by rockjunquie on May 11, 2019 21:56:10 GMT -5 I dunno but it's pretty cool!

braat spending too much on rocks Member since December 2016 Posts: 350	Mystery round spots in quartz?? May 11, 2019 22:23:55 GMT -5 rockjunquie likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by braat on May 11, 2019 22:23:55 GMT -5 May 11, 2019 21:56:10 GMT -5 rockjunquie said: I dunno but it's pretty cool! That's what I thought when I saw it
	Glen

QuailRiver
fully equipped rock polisher

Member since May 2008
Posts: 1,640

Mystery round spots in quartz?? May 11, 2019 23:04:21 GMT -5 braat likes this

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Post by QuailRiver on May 11, 2019 23:04:21 GMT -5

Looks like it could be some type of Oolitic agate. Not a true Oolite but one that falls under the generic term as far as the trade/hobby is concerned. True Ooilite formed from ooids have orbs 2mm or less in diameter. I've also seen similar materials referred to as Fish Egg Agate.

Larry C

Last Edit: May 11, 2019 23:06:05 GMT -5 by QuailRiver

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