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

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
09 Dec-04:52:01 Re: new generation for picture - ploum (Ploum)
08 Dec-15:19:35 Re: don lum collection (Don Lum)
08 Dec-12:59:13 Re: fun with mineralogy (Firmo Espinar)
08 Dec-06:58:43 Re: new generation for picture - ploum (Ploum)
07 Dec-17:36:22 Re: new generation for picture - ploum (Ploum)
07 Dec-13:10:12 Re: asbestos name change (Peter Lemkin)
07 Dec-10:55:28 Re: collection of michael shaw (Michael Shaw)
07 Dec-03:46:08 Re: new generation for picture - ploum (Ploum)
07 Dec-02:50:51 The mizunaka collection - quartz (Am Mizunaka)
06 Dec-16:11:47 Fun with mineralogy (Cascaillou)
06 Dec-05:11:52 Re: collection of firmo espinar (Firmo Espinar)
05 Dec-05:37:49 Re: new generation for picture - ploum (Ploum)
04 Dec-20:28:22 Re: asbestos name change (Woody Thompson)
04 Dec-18:09:03 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
04 Dec-16:10:55 Re: new generation for picture - ploum (Ploum)
04 Dec-14:27:18 Re: "jaguar" agates from wy (Bob Harman)
04 Dec-13:31:57 Re: "jaguar" agates from wy (Jrh4)
04 Dec-11:39:46 Re: a mineralogical trip through the regions of the uk - england / county durham (Jesse Fisher)
04 Dec-11:00:27 Re: munich show (mineralientage) 2019 (John S. White)
04 Dec-09:22:45 Re: munich show (mineralientage) 2019 (Tony L. Potucek)
04 Dec-04:56:00 Re: asbestos town name change (James Catmur)
04 Dec-03:20:27 Re: a mineralogical trip through germany / sachsen - saxony (Tobi)
04 Dec-03:19:33 Re: "jaguar" agates from wy (Jordi Fabre)
03 Dec-19:52:58 Re:"jaguar" agates from wy (Jrh4)
03 Dec-19:39:11 Re: a mineralogical trip through germany / sachsen - saxony (Jesse Fisher)

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
60674


The time now is Dec 09, 2019 06:18

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Inclusions of spiral or helical growth and screw dislocations - (0)
  Goto page Previous  1, 2, 3
  Index -> Featured Columns of FMF
Like
35


View previous topic :: View next topic  
Author Message

Elise




Joined: 22 Dec 2009
Posts: 243
Location: New York State


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Dec 17, 2015 14:51    Post subject: Re: Inclusions of spiral or helical growth and screw dislocations - (0)  

Look what's on the 2016 15th Annual Westward Look Mineral Show poster - it features a 49-mm-tall heliodor crystal from the Yellow Water Mine in Tajikistan; photographed by Joe Budd (shared with permission from Dave Waisman)!


2016_Westward_Look_Show_Joe_Budd_photo.jpg
 Description:
15th Annual Westward Look Mineral Show poster. Photo: Joe Budd
 Viewed:  2455 Time(s)

2016_Westward_Look_Show_Joe_Budd_photo.jpg



_________________
Elise Skalwold
Back to top
Reply to topic Reply with quote
Like
3
   

Sante Celiberti




Joined: 04 Oct 2019
Posts: 43
Location: Tuscany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 11, 2019 15:46    Post subject: Re: Inclusions of spiral or helical growth and screw dislocations - (0)  

Hello.

I have in my quartz sub-collection two small crystals, coming from the same locality, with a curious inclusion that resembles the screw dislocation.

The first one shows a tunnel with a geometrical "repetitive" pattern. Surprisingly the tunnel is open on both sides. I guess it is a sort of etching/dissolution that interested the included mineral (probably Siderite, which is often associated with Quartz from this locality).

The second one shows a small inclusion of possible Siderite with the same repetitive screw pattern, which needs to be magnified.

I would like to know the experts opinion.
Thanks in advance.
Best regards.
Sante



IMG_20191110_190920.jpg
 Mineral: Quartz
 Locality:
Leoni Mountain, Sticciano, Roccastrada, Grosseto Province, Tuscany, Italy
 Dimensions: 15,66 x 13,85 x 8 mm
 Description:
Front view. The crystal has grown on C axis and the pattern is parallel to it.
 Viewed:  199 Time(s)

IMG_20191110_190920.jpg



IMG_20191110_191358.jpg
 Mineral: Quartz
 Locality:
Leoni Mountain, Sticciano, Roccastrada, Grosseto Province, Tuscany, Italy
 Dimensions: 15,66 x 13,85 x 8 mm
 Description:
Back view.
 Viewed:  197 Time(s)

IMG_20191110_191358.jpg



IMG_20191110_185423.jpg
 Mineral: Quartz
 Locality:
Leoni Mountain, Sticciano, Roccastrada, Grosseto Province, Tuscany, Italy
 Dimensions: 15,66 x 13,85 x 8 mm
 Description:
The tunnel is open on both sides.
 Viewed:  199 Time(s)

IMG_20191110_185423.jpg



IMG_20191111_174237.jpg
 Mineral: Quartz, Siderite
 Locality:
Leoni Mountain, Sticciano, Roccastrada, Grosseto Province, Tuscany, Italy
 Dimensions: 20 x 14 x 5 mm
 Description:
The crystal has grown on A axis.The possible Siderite inclusion with screw pattern is neither parallel to the A axis nor to the C axis.
 Viewed:  203 Time(s)

IMG_20191111_174237.jpg


Back to top
Reply to topic Reply with quote
Like
2
   
Display posts from previous:   
   Index -> Featured Columns of FMF   All times are GMT - 5 Hours
Page 3 of 3
  Goto page Previous  1, 2, 3  

 
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 2006-2019


Powered by FMF