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Pseudomorph? (Read 1985 times)

Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Pseudomorph? Jun 28^th, 2015 at 9:03am	Print Post
	Pseudomorph after siderite?

	z294.JPG ( 792 KB \| 52 Downloads ) Scott LaBorde RockHoundLounge Creator
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JoeM God Member Offline I Love YaBB 2.5 AE! Posts: 4211 Location: Wake County, NC Joined: Sep 30^th, 2010 Gender:	Re: Pseudomorph? Reply #1 - Jun 29^th, 2015 at 5:44pm	Print Post
	Thanks for the pic, Scott. I was thinking siderite when Collin posted pictures of this material earlier. But now that I get an even better look at it, I don't know. HA! It looks more like little pieces of feldspar forming the clumps? Would like to see these with even better magnification.


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Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Re: Pseudomorph? Reply #2 - Jun 30^th, 2015 at 8:37am	Print Post
	I'll magnify it when I get home today.

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Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Re: Pseudomorph? Reply #3 - Jun 30^th, 2015 at 5:31pm	Print Post
	Okay here's the closeups.

	z295.JPG ( 573 KB \| 77 Downloads ) pseudomorph3.jpg ( 196 KB \| 55 Downloads ) pseudomorph4.jpg ( 137 KB \| 47 Downloads ) pseudomorph5.jpg ( 145 KB \| 45 Downloads ) Scott LaBorde RockHoundLounge Creator
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Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Re: Pseudomorph? Reply #4 - Jun 30^th, 2015 at 5:33pm	Print Post
	Keep in mind I haven't put this specimen in acid so there is definitely some iron oxide staining.� But it certainly looks like feldspar or dolomite now.
	« Last Edit: Jun 30^th, 2015 at 6:48pm by Scott LaBorde »
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Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Re: Pseudomorph? Reply #5 - Jun 30^th, 2015 at 6:52pm	Print Post
	I also found iridescent hematite coating this specimen.

	z296.JPG ( 488 KB \| 47 Downloads ) Scott LaBorde RockHoundLounge Creator
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FireOnTheMountain Full Member Offline RockHoundLounger Posts: 139 Joined: Mar 26^th, 2014 Gender:	Re: Pseudomorph? Reply #6 - Jun 30^th, 2015 at 8:06pm	Print Post
	Very cool!


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JoeM God Member Offline I Love YaBB 2.5 AE! Posts: 4211 Location: Wake County, NC Joined: Sep 30^th, 2010 Gender:	Re: Pseudomorph? Reply #7 - Jun 30^th, 2015 at 9:09pm	Print Post
	very cool for sure! nice job on the closeups. dolomite sounds good, too. and I wonder if that fine white coating is chalcedony or some other mineral?


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Laurie Adams Ex Member	Re: Pseudomorph? Reply #8 - Jul 1^st, 2015 at 3:43pm	Print Post
	i think it's a thin rind of botryoidal chalcedony covering rhombic dolomite crystals on quartz.


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Scott LaBorde RHL Administrator Offline "Rock it" science! Posts: 2975 Location: Wake Forest, NC Joined: Sep 28^th, 2010 Gender:	Re: Pseudomorph? Reply #9 - Jul 2^nd, 2015 at 10:57pm	Print Post
	Here's a couple more closeups.

	z297.JPG ( 648 KB \| 59 Downloads ) pseudomorph7b.jpg ( 177 KB \| 48 Downloads ) Scott LaBorde RockHoundLounge Creator
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