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Newest topics and users posts
23 Jul-18:40:43 Re: black, metallic, yellow oxide? (Bob Carnein)
23 Jul-17:36:31 Re: black, metallic, yellow oxide? (Linus)
23 Jul-17:34:00 Re: black, metallic, yellow oxide? (Linus)
23 Jul-09:37:34 Re: help identify this rock. Sapphire?? (James Catmur)
23 Jul-09:03:02 Re: unknown mineral from pikes peak pegmatite (Bob Morgan)
23 Jul-07:27:50 Re: black, metallic, yellow oxide? (Susan Robinson)
23 Jul-02:23:46 Re: mineral talks live - episode 41 - alan hart - ceo; gem-a, london, england, united king (Tobi)
23 Jul-02:20:06 Re: hillman hall of minerals and gems (Tobi)
23 Jul-02:15:45 Re: black, metallic, yellow oxide? (Tobi)
23 Jul-02:03:58 Re: help identify this rock. Sapphire?? (Tobi)
22 Jul-22:56:37 Re: help identify this rock. Sapphire?? (Steveb)
22 Jul-22:46:39 Re: help identify this rock. Sapphire?? (Gentrydodd)
22 Jul-22:44:53 Re: help identify this rock. Sapphire?? (Volkmar Stingl)
22 Jul-22:41:14 Help identify this rock. Sapphire?? (Gentrydodd)
22 Jul-22:05:14 Re: help identify this rock (Alexsolis)
22 Jul-22:00:01 Re: help identify this rock (Matt_zukowski)
22 Jul-20:07:46 Help identify this rock (Alexsolis)
22 Jul-16:58:25 Re: black, metallic, yellow oxide? (Linus)
22 Jul-15:30:24 Re: black, metallic, yellow oxide? (Linus)
22 Jul-15:20:13 Re: black, metallic, yellow oxide? (Linus)
22 Jul-12:43:41 Re: hillman hall of minerals and gems (Riccardo Modanesi)
22 Jul-09:56:35 Re: unknown mineral from pikes peak pegmatite (Bob Carnein)
22 Jul-03:47:30 Re: black, metallic, yellow oxide? (Tobi)
21 Jul-20:37:55 Re: black, metallic, yellow oxide? (Linus)
21 Jul-20:28:03 Re: black, metallic, yellow oxide? (Pete Richards)

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  Topic: Stumped. Help with identifying
Peter Perkins

Replies: 10
Views: 2306

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 30, 2020 07:27   Subject: Re: Stumped. Help with identifying.
Bob and LAB - do you think it might be Quartz with Tourmaline in it? I wouldn't expect calcite to be quite so shiny and, if calcite, I would expect a pebble to show at least some evidence of damage f ...
  Topic: What is this?
Peter Perkins

Replies: 11
Views: 2321

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 15, 2020 08:21   Subject: Re: What is this?
I think it would be more rewarding to break it in half, rather than cut it. The freshly broken surfaces might show cubes of Pyrite sticking out. If it was cut, there would be patches of gold colour ...
  Topic: Mining objects.
Peter Perkins

Replies: 30
Views: 18760

PostForum: The histories behind mineral specimens   Posted: Apr 09, 2020 02:57   Subject: Re: Mining objects.
I think wood worms are strongly of the opinion the soles are of wood!
  Topic: Could someone tell what this is, is it man made?
Peter Perkins

Replies: 7
Views: 7308

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Mar 08, 2020 12:32   Subject: Re: could someone tell what this is, is it man made?
Definitely a sandstone. At certain times during its formation the rivers feeding into the zone of sedimentation were carrying a lot more mica flakes than usual. Maybe call it a micaceous sandstone
  Topic: Maximum number of minerals on a specimen
Peter Perkins

Replies: 37
Views: 57929

PostForum: The Ten Thousand Club   Posted: May 06, 2018 03:02   Subject: Re: Maximum number of minerals on a specimen
To those waiting to hear about "Trepca Minerals Atlas" - I'm still waiting for a reply.
To those specially interested in Sulfides - do you know of this book:- "Pyrite" by David R ...
  Topic: Maximum number of minerals on a specimen
Peter Perkins

Replies: 37
Views: 57929

PostForum: The Ten Thousand Club   Posted: Apr 30, 2018 04:41   Subject: Re: Maximum number of minerals on a specimen
Peter and Bob (and others) I am obtaining for you the details of where to get the book together with cost (I didn't have to purchase mine). I can give you the ISBN:- 978-9951-466-76-9. I will get back ...
  Topic: Maximum number of minerals on a specimen
Peter Perkins

Replies: 37
Views: 57929

PostForum: The Ten Thousand Club   Posted: Apr 29, 2018 14:02   Subject: Re: Maximum number of minerals on a specimen
Bob, I like the idea of 'sociable sulphides' I scrolled down your first three images and came to the fourth, without looking at the description first, and thought "That looks like Trepĉa!&qu ...
  Topic: Quartz druze
Peter Perkins

Replies: 12
Views: 12912

PostForum: Mines and Mineral Localities   Posted: Apr 08, 2016 03:48   Subject: Re: Quartz druze.
vic: You appear to be attacking it with a steel bar. Why not leave it for others to appreciate?
  Topic: Which club??
Peter Perkins

Replies: 13
Views: 10700

PostForum: Off-Topic and Introductions   Posted: Dec 22, 2015 04:02   Subject: Re: Which club??
I thought you would have found a club by now!
Try Black Country Geol Soc at https://bcgs.info/pub/
or the West Midlands Regional Group of the Geol Soc at https://www.geolsoc.org.uk/wmrg
[I used to ...
  Topic: Please help with fluorescent minerals
Peter Perkins

Replies: 9
Views: 8335

PostForum: Off-Topic and Introductions   Posted: Nov 12, 2015 15:57   Subject: Re: Please help with fluorescent minerals
Kat,
In my experience of teaching in schools and showing minerals and fossils to youngsters of all ages your step daughter will be more enthralled by the three dimensions of minerals in ordinary ligh ...
  Topic: Uhaul
Peter Perkins

Replies: 8
Views: 9822

PostForum: Off-Topic and Introductions   Posted: Apr 30, 2014 03:09   Subject: Re: Uhaul
We had better tell them that Dolomite is hexagonal and not cubic! Peter
  Topic: Royal Blue Lapis Lazuli
Peter Perkins

Replies: 8
Views: 8027

PostForum: Off-Topic and Introductions   Posted: Mar 09, 2014 03:33   Subject: Re: Royal Blue Lapis Lazuli
Mark, If you are going to talk about the cambro-ordivician boundary, never mind waving your arms about, nobody will know what you are talking about!
  Topic: Question About Basalt
Peter Perkins

Replies: 4
Views: 7370

PostForum: Minerals and Mineralogy   Posted: Apr 26, 2013 08:44   Subject: Re: Question About Basalt
trtlman,
I have a suggestion about the glassy bumps that are white. Although I must say that the white on the first picture isn't what I would expect. Lets go back to the formation - when the rock ...
  Topic: Looking for geologic/mineral sites to visit in Spain, Portugal
Peter Perkins

Replies: 6
Views: 12502

PostForum: Rockhounding trips   Posted: Apr 15, 2013 04:22   Subject: Re: Looking for geologic/mineral sites to visit in Spain, Portugal
Pete,
My first suggestion is to google Geoparks. In N. Portugal there is one in and around Arouca - biotite nodules and giant trilobites as well as other geological features. There is a second one ...
  Topic: Difference?
Peter Perkins

Replies: 9
Views: 9109

PostForum: Minerals and Mineralogy   Posted: Feb 25, 2013 04:38   Subject: Re: Difference?
Think of a crystal as a manifestation of a mineral. A mineral may take the form of a crystal - in fact, it does so more often than not.
  Topic: Oxfordshire Mineral Groups and Specimens
Peter Perkins

Replies: 8
Views: 8440

PostForum: Off-Topic and Introductions   Posted: Jan 02, 2013 04:06   Subject: Re: Oxfordshire Mineral Groups and Specimens
There is an Oxford Geology Group. This setup would not accept the website address and 'send' the message I first wrote!. You should be able to find them if you google their name.
I hope you find en ...
  Topic: Siderite - maybe
Peter Perkins

Replies: 9
Views: 8050

PostForum: Minerals and Mineralogy   Posted: Nov 30, 2012 05:12   Subject: Re: Siderite - maybe
Volkmar,
It is important to distinguish between the correct spelling of a place name (Stari Trg) and the spelling used by authors of a scientific paper (Stan Terg). Peter
  Topic: Siderite - maybe
Peter Perkins

Replies: 9
Views: 8050

PostForum: Minerals and Mineralogy   Posted: Nov 29, 2012 16:03   Subject: Re: Siderite - maybe
To Susan and Jordi,
No feldspar at Trepca. It bis a Pb/Zn mine yielding galena, sphalerite and also pyrite, arsenopyrite, boulangerite, calcite, dolomite, rhodochrosite, siderite and quartz. If you ...
  Topic: Siderite - maybe
Peter Perkins

Replies: 9
Views: 8050

PostForum: Minerals and Mineralogy   Posted: Nov 29, 2012 09:50   Subject: Siderite - maybe
These slender quartz crystals have a covering of brown/ginger crystals which I think are siderite. Do you agree? If not have you another suggestion? Sorry the focus isn't better.
  Topic: Calcite (Specimen No2)
Peter Perkins

Replies: 1
Views: 3606

PostForum: Minerals and Mineralogy   Posted: Nov 18, 2012 11:17   Subject: Calcite (Specimen No2)
How ought I to describe these calcite crystals. They appear to be of two Nail Head Spar (flat rhombohedron) termionations, end to end with no prism faces associated with them.
 
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