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Let's Rock => Identifications of Materials => Topic started by: Itsandbits on January 24, 2015, 07:37:44 AM

Title: curious as to what you think of this
Post by: Itsandbits on January 24, 2015, 07:37:44 AM

Thanks for looking
A rock I found in the Fraser in the same place as the jade. It has been in the river for while a while and taken a lot of abuse so  the green material stands proud of the rest a bit which tells me it's harder; agate won't scratch it. It's around 3 SG, polishes easily. I initially thought it was a variolite but in magnification you can see that the green material looks like it was liquid at one point and there are filaments/lattice of it connecting the larger spots. Maybe another form of the sillimanite?????????
(https://lh6.googleusercontent.com/-bLelyJa2kq0/VKXYcYTwN-I/AAAAAAAAPkY/vKE39pasSHQ/w702-h735-no/IMG_20150101_140225.jpg)
quick polish up to 3000grit
(https://lh6.googleusercontent.com/-qWtGb-yYxtc/VKXYcWKyqvI/AAAAAAAAPME/ovkyEJS8b4A/w980-h735-no/IMG_20150101_140335.jpg)
some close ups
(https://lh3.googleusercontent.com/-pQ6ZAwCQfeQ/VKXYced1L_I/AAAAAAAAPL4/uRtlJW8JWzY/w980-h735-no/IMG_20150101_152338.jpg)
going from the polished surface to the rough on top of the pic
(https://lh3.googleusercontent.com/-WIyRApAeRe4/VKXYcV69j1I/AAAAAAAAPkg/H94oUahfgB8/w980-h735-no/IMG_20150101_140454.jpg)
This low colour picture highlites the green material
(https://lh5.googleusercontent.com/-867nRt642FA/VKXYcXT7syI/AAAAAAAAPL4/BGH71uCoAXI/w980-h735-no/IMG_20150101_141852.jpg)

Title: Re: curious as to what you think of this
Post by: wampidy on January 24, 2015, 08:20:43 AM

That is some strange stuff. The first photo looks like brecciated jade but the other photos reverse that and look like ? ? ?
Jim

Title: Re: curious as to what you think of this
Post by: Itsandbits on January 24, 2015, 08:38:16 AM

Quote from: wampidy on January 24, 2015, 08:20:43 AM

That is some strange stuff. The first photo looks like brecciated jade but the other photos reverse that and look like ? ? ?
Jim

those were my exact thoughts Jim ??????????????  Lots of head scratching going on with this one.  In general terms I guess it would be a plagioclase.

Title: Re: curious as to what you think of this
Post by: Minkos61 on January 24, 2015, 04:58:12 PM

No idea what it is Lloyd but it is pretty cool looking material  :coffee2:

Title: Re: curious as to what you think of this
Post by: ScarlettOSara on January 24, 2015, 06:31:27 PM

Pretty cool looking, it that pyrite in the cracks?

Title: Re: curious as to what you think of this
Post by: Itsandbits on January 24, 2015, 10:33:13 PM

Thanks Ernie, I'm going too try a cab from it this spring. I don't know what is in between the green blobs Sara but It's hard to say. This is a pretty oxidized and beat up rock and just surface polished so I'll find out more when I cut

Title: Re: curious as to what you think of this
Post by: lithicbeads on January 24, 2015, 11:55:12 PM

These are fairly common down here on the beach. Some folks like them for belt buckles because they are so hard and uniform.

Title: Re: curious as to what you think of this
Post by: Enchantra on January 25, 2015, 04:46:23 PM

Whatever material it is Lloyd I think you need to cab it.   :headbang: