We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


Spanish message board






Newest topics and users posts
29 Oct-19:21:10 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-18:33:14 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-17:52:26 Re: unusual bar pyrite from nanisivik (Bob Morgan)
29 Oct-17:01:35 Re: unusual bar pyrite from nanisivik (David K. Joyce)
29 Oct-17:00:17 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-16:48:07 Re: unusual bar pyrite from nanisivik (Linus)
29 Oct-16:46:49 Re: unusual bar pyrite from nanisivik (Linus)
29 Oct-16:43:01 Re: unusual bar pyrite from nanisivik (David K. Joyce)
29 Oct-16:22:47 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-16:11:15 Re: collection of sante celiberti (Sante Celiberti)
29 Oct-15:57:14 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-15:48:18 Re: unusual bar pyrite from nanisivik (David K. Joyce)
29 Oct-15:38:37 Re: unusual bar pyrite from nanisivik (Lluis)
29 Oct-15:21:38 Re: unusual bar pyrite from nanisivik (Russepp)
29 Oct-15:05:14 Re: unusual bar pyrite from nanisivik (Linus)
29 Oct-14:54:57 Re: unusual bar pyrite from nanisivik (Bob Morgan)
29 Oct-14:26:44 Re: unusual bar pyrite from nanisivik (David K. Joyce)
29 Oct-14:25:22 Re: collection of michael shaw (Michael Shaw)
29 Oct-13:45:20 Re: unusual bar pyrite from nanisivik (James Catmur)
29 Oct-13:23:27 Re: unusual bar pyrite from nanisivik (James Catmur)
29 Oct-13:00:17 Re: presentation of new members - russ epp from manitoba, canada (Don Lum)
29 Oct-12:20:05 Unusual bar pyrite from nanisivik (Russepp)
28 Oct-11:23:37 Re: collection of michael shaw (Michael Shaw)
28 Oct-09:19:05 Re: quartz with small garnets (Bob Carnein)
28 Oct-05:15:48 Re: collection of michael shaw (Tobi)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
73791


The time now is Oct 29, 2020 23:48

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Interesting find, opalized scoria from oregon
  
  Index -> What is it? - Where is it from?
Like
1


View previous topic :: View next topic  
Author Message

Hardman.digs




Joined: 09 Dec 2017
Posts: 2
Location: Traveling

View user's profile

Send private message

PostPosted: Sep 17, 2020 18:17    Post subject: Interesting find, opalized scoria from oregon  

So is this a common occurrence anywhere? It's the first time I have run into this sort of thing in Oregon. Its an opalized scoria that's for sure. Also I'm wondering how bad of an idea it would be to try to slice up some for small interesting cabochons. The overall size of the piece is about 3 x 4 x 7 inches.


Screenshot_20200917-161046_Gallery.jpg
 Description:
 Viewed:  490 Time(s)

Screenshot_20200917-161046_Gallery.jpg



Screenshot_20200917-161032_Gallery.jpg
 Description:
 Viewed:  488 Time(s)

Screenshot_20200917-161032_Gallery.jpg


Back to top
Reply to topic Reply with quote
Like
   

marco campos-venuti




Joined: 09 Apr 2014
Posts: 193
Location: Sevilla


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Sep 18, 2020 05:31    Post subject: Re: Interesting find, opalized scoria from oregon  

Scorias are often filled by silica because cavities drain water. It is difficult to find empty cavities in old scorias from the geological record. More often they are filled by something, zeolites, carbonates or silica. Some vesicular basalts contain precious opal and others are filled by small agates. I guess you can polish, both opal and scoria glass take a good polish and have similar hardness.
Enjoy cutting!!
Back to top
Reply to topic Reply with quote
Like
1
   
Display posts from previous:   
   Index -> What is it? - Where is it from?   All times are GMT - 5 Hours
Page 1 of 1
    

 
Jump to:  
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 vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2020


Powered by FMF