January 24 Through February 4—TUCSON, ARIZONA: Annual show
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Mar 28, 2024 9:46 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 14 posts ] 
Author Message
 Post subject: Pallasite?
PostPosted: Sun Dec 18, 2016 9:49 am 
Offline
Valued Contributor
User avatar

Joined: Wed Nov 12, 2014 4:12 am
Posts: 102
Hello everyone,

A Pallasite? or what do you say? :)


Attachments:
2.jpg
2.jpg [ 130.79 KiB | Viewed 905 times ]
1.jpg
1.jpg [ 131.17 KiB | Viewed 905 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Sun Dec 18, 2016 12:27 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Morning Gabroo. I think we need a little more information. :D


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Sun Dec 18, 2016 7:11 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 4015
Location: North Carolina
It appears to be a stone of some sort.

_________________
Rough and cut classic and exotic synthetic gems:https://store.turtleshoard.com


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Sun Dec 18, 2016 10:10 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Abraded table facets...Looks like the "stone" had a life before this photo session.


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 12:29 am 
Offline
Valued Contributor

Joined: Sat Nov 05, 2016 11:29 am
Posts: 142
Must have been abraded coming through the atmosphere...


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 10:12 am 
Offline
Valued Contributor
User avatar

Joined: Wed Nov 12, 2014 4:12 am
Posts: 102
Thank you Barbra and all others for their input and Morning,

It could be anything. S.G. of some Peridots are almost same as corrundum, i was totally away from gemology for more than a year now , after basic tests it could be Sapphire, rutile needles, i will have to check its RI index, if my refractrometer is still working, which i doubt.
Ablation does usually not abrade rocks, its hardness and bad/rough use which does, testing this stone's hardness means i will destroy it,
that rough how i test rocks


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 1:40 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
I'm confident your refractometer is still working. They will usually befriend us for life. :D


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 3:40 pm 
Offline
Valued Contributor

Joined: Fri Nov 07, 2014 5:21 pm
Posts: 418
Location: Morden, MB, Canada
To be possibly qualified for palssite it should be first be ID as olivine (peridot)

_________________
Premium wedding gold rings&bands https://www.etsy.com/shop/energyosjewelry


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 6:50 pm 
Offline
Gold Member

Joined: Mon May 26, 2014 9:42 pm
Posts: 1033
A Pallasite is a meteor that contains peridot inclusions. Typical slices show nice polished iron and peridot you can see through. Diagnosis is usually not difficult. You can etch the metal to see the pattern.

When I see a random, poorly cut yellow stone, I don't normally jump to pallasite. Even if it turned out to be fosterite/peridot, I wouldn't jump to pallasite. So the real question I have is ... why would you think it was a pallasite? Was it sold to you as one? About the only thing it has going for it is the color.


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 7:07 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Image

Discussed before:
viewtopic.php?t=5016


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Mon Dec 19, 2016 10:05 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 4015
Location: North Carolina
You know, I've never seen a yellow or brown olivine offered for sale even though they're documented as relatively common varieties.

_________________
Rough and cut classic and exotic synthetic gems:https://store.turtleshoard.com


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Wed Dec 21, 2016 12:25 am 
Offline
Valued Contributor
User avatar

Joined: Wed Nov 12, 2014 4:12 am
Posts: 102
Everyone is right in their own opinions, best i can do to send this stone to lab for testing its metal content.

Yes Barbra you got a good eye, this stone was in inherited inventory for last 30 years before i bought it.

Sapphires sometimes regardless of synthetic or natural or weather any reason are also found facet abraded.

When a pallasite or any other rock is thin sectioned, it will most likely be see through weather in or outside the slide..Or may be 1 mm thick might be see through as well.


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Fri Dec 23, 2016 12:40 pm 
Offline
Valued Contributor

Joined: Sun Mar 08, 2009 2:16 pm
Posts: 331
Barbra, your image looks like a Borg sapceship!
Regards Pallasite, please have a look at the linked article to see if any of this can help you with your ID:

http://stonegrouplabs.com/wp/wp-content ... site-1.pdf
[pdfview]http://stonegrouplabs.com/wp/wp-content/uploads/2014/05/0314GG-MarAprGMNPallasite-1.pdf[/pdfview]

I was surprised to see that while surrounded by nickle, there is only very low trace readings within pallasitic peridot.


Top
 Profile  
Reply with quote  
 Post subject: Re: Pallasite?
PostPosted: Sun Dec 25, 2016 2:49 am 
Offline
Valued Contributor
User avatar

Joined: Wed Nov 12, 2014 4:12 am
Posts: 102
Thanks Bear Williams for Pdf, and,

Merry Christmas to everyone.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 14 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 21 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock