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
14 Sep-23:42:20 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
14 Sep-23:40:13 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
14 Sep-13:47:20 The mizunaka collection - quartz (Am Mizunaka)
14 Sep-06:17:55 Re: collection of philippe durand (Philippe Durand)
14 Sep-04:02:34 Re: collection of firmo espinar (Firmo Espinar)
13 Sep-11:59:20 Re: may i get a read (Pete Richards)
13 Sep-11:03:32 Re: may i get a read (Rich Loose)
13 Sep-09:34:58 Re: may i get a read (Jim Hill)
12 Sep-19:30:30 Re: unreliable water guns? (Joseph Doliveira)
12 Sep-19:22:52 Re: may i get a read (Joseph Doliveira)
12 Sep-18:47:23 Re: the mizunaka collection - rhodochrosite (Am Mizunaka)
12 Sep-16:20:38 Re: may i get a read (Jim Hill)
12 Sep-16:11:37 Re: may i get a read (Matt_zukowski)
12 Sep-15:47:35 Re: unreliable water guns? (Bob Harman)
12 Sep-15:38:48 May i get a read (Jim Hill)
12 Sep-09:48:47 Re: the mizunaka collection - rhodochrosite (Tobi)
11 Sep-18:48:25 The mizunaka collection - rhodochrosite (Am Mizunaka)
11 Sep-14:26:05 Re: donating funds - rock currier collection auction (Gail)
11 Sep-14:18:31 Re: donating funds - rock currier collection auction (Jordi Fabre)
11 Sep-12:18:30 Re: donating funds - rock currier collection auction (Gail)
11 Sep-12:05:12 Donating funds - rock currier collection auction (Jordi Fabre)
09 Sep-14:33:43 Re: the mizunaka collection - quartz (Am Mizunaka)
09 Sep-12:35:25 Re: collection from dany mabillard (Dany Mabillard)
09 Sep-09:55:11 Re: don lum collection (Don Lum)
09 Sep-03:37:04 Re: collection of enrique llorens (Enrique Llorens)

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
58189


The time now is Sep 15, 2019 03:02

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
A mineralogical trip through the regions of the UK - England / County Durham
  Goto page Previous  1, 2, 3, 4, 5, 6
  Index -> A mineralogical trip through the regions of the UK
Like
281


View previous topic :: View next topic  
Author Message

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 01, 2018 14:36    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Two cross veins in the Rogerley system are exposed in an extension of the Rogerley quarry, NW of the main mine site. The larger of the two has been named the "Sutcliffe Vein" in honor of Lindsay Greenbank's partner and co-discoverer of the Rogerley, Mick Sutcliffe. During the early to mid 1970s the two collected a number of specimens from flats adjoining the vein, which was at the time referred to by Lindsay as the "Rogerley #2 vein." Purple is more common at this location than at the Rogerley proper, and some of the best have a purple core covered by a green rind.

In the fall of 2017 Ian Bruce (Crystal Classics) developed the vein as an open cast and named his workings the "Diana Marie Mine." A good number of specimens were recovered and were available at the Munich and Tucson shows.



F117-9860r.JPG
 Mineral: Fluorite
 Locality:
Rogerley Mine, Sutcliffe vein, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: FOV = 6 cm
 Description:
Bicolor penetration twin recovered in the mid 1970s. Ex Mick Sutcleffe collection
 Viewed:  3783 Time(s)

F117-9860r.JPG



WestQuarry9-8-02r.jpg
 Locality:
Rogerley Mine, Sutcliffe vein, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Description:
A view of the western extension of the Rogerley Quarry, taken in 2002. The Sutcliffe Vein is the larger of the two ribs of rock extending from the quarry face. The smaller rib, to the left of the Sutcliffe has never to my knowledge been prospected. I understand that the site looks a bit different now, after recent work.
 Viewed:  3757 Time(s)

WestQuarry9-8-02r.jpg


Back to top
Reply to topic Reply with quote
Like
4
   

colin robinson




Joined: 29 May 2013
Posts: 75
Location: Cumbria


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 01, 2018 15:06    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Fluorite from Rogerley no. 2 (Sutcliffe) vein. Main crystal about 12mm. Self collected.


sutcliffes2.JPG
 Mineral: Fluorite
 Locality:
Rogerley Mine, Sutcliffe vein, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 12mm
 Description:
 Viewed:  3760 Time(s)

sutcliffes2.JPG


Back to top
Reply to topic Reply with quote
Like
5
   

colin robinson




Joined: 29 May 2013
Posts: 75
Location: Cumbria


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 01, 2018 15:11    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Fluorite from Middlegrove vein, Killhope mine. Glassy crystals to 8-9mm. Recovered from a vein outcrop.


TNkillhope.jpg
 Mineral: Fluorite
 Locality:
Killhope Mine, Middlegrove vein, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 8mm
 Description:
 Viewed:  3759 Time(s)

TNkillhope.jpg


Back to top
Reply to topic Reply with quote
Like
7
   

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 02, 2018 00:24    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

A bit of nostalgia - specimen was recovered in May 1999 from the first workings at the Black Sheep Pocket.


99-284-9315r.JPG
 Mineral: Fluorite, Galena, Quartz
 Locality:
Rogerley Mine, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 5x4x4 cm
 Description:
 Viewed:  3482 Time(s)

99-284-9315r.JPG


Back to top
Reply to topic Reply with quote
Like
10
   

Tobi




Joined: 07 Apr 2009
Posts: 3085
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 02, 2018 05:27    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Perfect, Jesse :-)
Back to top
Reply to topic Reply with quote
Like
   

Tobi




Joined: 07 Apr 2009
Posts: 3085
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 12, 2018 07:29    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Fluorite and one single galena, coated by siderite:


BoltFLUO.JPG
 Mineral: Siderite, Galena, Fluorite
 Locality:
Boltsburn Mine, Rookhope District, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: Specimen size 11 cm, largest galena 18 mm, largest fluorite 18 mm
 Description:
 Viewed:  3087 Time(s)

BoltFLUO.JPG


Back to top
Reply to topic Reply with quote
Like
5
   

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Sep 27, 2018 00:20    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Another Heights Mine specimen, well-formed cube-octahedral galena crystals with a few twinned fluorites. I was told that the specimen was collected in the late 1960s, so not sure if it should be labeled as from the mine or the quarry. I haven't seen galena crystals that sharp from Heights very often.


Heights-9982r.JPG
 Mineral: Galena, Fluorite
 Locality:
Heights Quarry, Westgate, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 9x7x4 cm overall size
 Description:
 Viewed:  2094 Time(s)

Heights-9982r.JPG


Back to top
Reply to topic Reply with quote
Like
8
   

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 04, 2019 14:28    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

A classic Boltsburn fluorite twin, found at the Tucson show last month. Most likely recovered circa 1910-1920, but unfortunately no old labels or historical information accompanied the specimen.


Boltsburn-6844r.JPG
 Mineral: Fluorite with Siderite
 Locality:
Boltsburn Mine, Rookhope District, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 8x8x7 cm overall size
 Description:
 Viewed:  1324 Time(s)

Boltsburn-6844r.JPG


Back to top
Reply to topic Reply with quote
Like
5
   

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 07, 2019 11:09    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

A recent find. In the above photo of the West Rogerley Quarry, I mentioned a smaller, unprospected vein next to the Sutcliffe vein, where Ian Bruce has established the Diana Marie Mine. Earlier this year his mining crew drove a crosscut from the Sutcliffe vein to explore this vein, which they are calling the "Rivet Catcher Vein." A small cavity of yellow fluorite partially overgrown by quartz was found. An unusual color for fluorite from the Rogerley vein system.


Rogerley-7003r.JPG
 Mineral: Fluorite and Quartz
 Locality:
Rogerley West Quarry, Rivet Catcher vein, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 12x11x5 cm
 Description:
 Viewed:  817 Time(s)

Rogerley-7003r.JPG


Back to top
Reply to topic Reply with quote
Like
4
   

Bob Harman




Joined: 06 Nov 2015
Posts: 576
Location: Indiana


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 07, 2019 13:06    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

I just spent the past 30 minutes or so on this hot humid afternoon looking thru the pages of this thread.

All great UK specimens!

I do have a couple of comments tho and one question, all related to size measurements. Throughout this and other threads the different posters use both mm and cm. Sometimes the specimen is given in cm, other times in mm, apparently without real important meaning. One posting from Tobi on 12 May 2018 used both cm and mm within the same specimen measurements.

For the larger specimens/crystals, say greater than about 2-4 cm, anyone have any thoughts on this or is it just personal preference and of no further meaning, both being equally acceptable, even using cm and mm within the same specimen's measurements.

BOB
Back to top
Reply to topic Reply with quote
Like
   

Kevin Schofield




Joined: 05 Jan 2018
Posts: 99
Location: Beacon NY

View user's profile

Send private message

PostPosted: Jul 07, 2019 14:03    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Bob Harman wrote:
I just spent the past 30 minutes or so on this hot humid afternoon looking thru the pages of this thread.

All great UK specimens!

I do have a couple of comments tho and one question, all related to size measurements. Throughout this and other threads the different posters use both mm and cm. Sometimes the specimen is given in cm, other times in mm, apparently without real important meaning. One posting from Tobi on 12 May 2018 used both cm and mm within the same specimen measurements.

For the larger specimens/crystals, say greater than about 2-4 cm, anyone have any thoughts on this or is it just personal preference and of no further meaning, both being equally acceptable, even using cm and mm within the same specimen's measurements.

BOB


Bob,

my guess is that it is a question of wishing to be more accurate when describing a detail (crystal size) rather than a generality (specimen size)...for specimen sizes, it is probably pointless to be so exacting as to quote to fractions of a centimetre When speaking of the size of a crystal, however, one may wish to be more precise in ones description, and would as a result also measure more accurately. There may also be some psychology involved (deliberate or subconscious) in that use of millimetric terminology carries a subtle implication that one has indeed measured with the requisite accuracy (17mm), rather than "just" saying 1.7cm.

_________________
Veni, Vidi, Emi
Back to top
Reply to topic Reply with quote
Like
   

Tobi




Joined: 07 Apr 2009
Posts: 3085
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 08, 2019 02:35    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

A very beautiful fluorite from Rogerley West Quarry, Jesse. I know the dark green ones are highly desired, but I think this one is also very nice, the coating makes a wonderful contrast. I really like it!

Kevin Schofield wrote:
Bob Harman wrote:
I do have a couple of comments tho and one question, all related to size measurements. Throughout this and other threads the different posters use both mm and cm. Sometimes the specimen is given in cm, other times in mm, apparently without real important meaning. One posting from Tobi on 12 May 2018 used both cm and mm within the same specimen measurements. For the larger specimens/crystals, say greater than about 2-4 cm, anyone have any thoughts on this or is it just personal preference and of no further meaning, both being equally acceptable, even using cm and mm within the same specimen's measurements.
Bob,
my guess is that it is a question of wishing to be more accurate when describing a detail (crystal size) rather than a generality (specimen size)...for specimen sizes, it is probably pointless to be so exacting as to quote to fractions of a centimetre When speaking of the size of a crystal, however, one may wish to be more precise in ones description, and would as a result also measure more accurately. There may also be some psychology involved (deliberate or subconscious) in that use of millimetric terminology carries a subtle implication that one has indeed measured with the requisite accuracy (17mm), rather than "just" saying 1.7cm.
I guess we all know the metric system so it should be equal if a crystal size is described with 17mm or 1,7cm. I think I will keep my way of describing specimens :-)
Back to top
Reply to topic Reply with quote
Like
   

Jesse Fisher




Joined: 18 Mar 2009
Posts: 528
Location: San Francisco


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 08, 2019 10:37    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

My inclination is to use mm only when describing something smaller than 1 cm, but this is just personal preference. I think we're pretty safe in assuming that everyone using FMF knows that 10 mm = 1 cm, and that we will use metric rather than imperial measurements.

But back to the minerals, here is an example of some of the recent produce from the Diana Marie Mine (Sutcliffe Vein). This was acquired at the Munich Show last October. The largest crystal is 2.6 cm on edge.



Sutcliffe-7013r.JPG
 Mineral: Fluorite with Calcite
 Locality:
Rogerley Mine, Sutcliffe vein, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 11x7x5 cm overall size
 Description:
 Viewed:  652 Time(s)

Sutcliffe-7013r.JPG


Back to top
Reply to topic Reply with quote
Like
7
   

Tobi




Joined: 07 Apr 2009
Posts: 3085
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 09, 2019 01:45    Post subject: Re: A mineralogical trip through the regions of the UK - England / County Durham  

Wonderful specimen!
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> A mineralogical trip through the regions of the UK   All times are GMT - 5 Hours
Page 6 of 6
  Goto page Previous  1, 2, 3, 4, 5, 6  

 
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