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03 Dec-10:59:16 Re: collection of michael shaw (Michael Shaw)
02 Dec-15:36:00 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
02 Dec-14:35:13 Re: collection of volkmar stingl (Volkmar Stingl)
01 Dec-23:12:31 The mizunaka collection - quartz (Am Mizunaka)
01 Dec-15:07:40 Re: may i get a read (James Catmur)
01 Dec-14:33:23 Another cassiterite - silvia's collection (Silvia)
01 Dec-13:19:30 Re: collection of mineralenzo (Mineralenzo)
01 Dec-13:18:56 Re: collection of firmo espinar (Firmo Espinar)
01 Dec-11:39:01 Collection of mineralenzo (Mineralenzo)
01 Dec-11:31:03 Re: may i get a read (Alfredo)
01 Dec-11:12:35 Re: collection of michael shaw (Michael Shaw)
01 Dec-10:59:50 Re: may i get a read (Kevin Schofield)
01 Dec-10:19:17 Re: may i get a read (Bob Carnein)
01 Dec-06:44:23 May i get a read (Jim Hill)
30 Nov-23:52:49 Re: don lum collection (Don Lum)
30 Nov-15:38:26 Re: presentation of new members - triptichauhan and enzo (Firmo Espinar)
30 Nov-14:49:09 Re: presentation of new members - mineralenzo from sicily (Philippe Durand)
30 Nov-11:02:36 Re: presentation of new members - mineralenzo from sicily (Don Lum)
30 Nov-10:53:14 Presentation of new members - mineralenzo from sicily (Mineralenzo)
30 Nov-00:11:09 Re: new generation for picture - ploum (Ploum)
29 Nov-15:54:06 Re: presentation of new members - triptichauhan from faridabad (Don Lum)
29 Nov-12:35:56 Re: presentation of new members - triptichauhan from faridabad (Philippe Durand)
29 Nov-09:34:07 Re: cannon slr with stacking (Vinoterapia)
29 Nov-07:59:05 Re: cannon slr with stacking (James Catmur)
29 Nov-07:56:57 Re: cannon slr with stacking (James Catmur)

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  Topic: Some beautiful obsidian like rocks
R Saunders

Replies: 6
Views: 972

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 20, 2021 10:24   Subject: Re: Some beautiful obsidian like rocks
Many USA glass factories would dispose of the left over glass in the furnaces when they changed colors or closed up shop, or had to repair a cracked furnace. I have seen especially Fenton glass slag/l ...
  Topic: Article on Naica and Gypsum
R Saunders

Replies: 4
Views: 1023

PostForum: Mineralogical Literature   Posted: Oct 14, 2021 08:47   Subject: Re: Article on Naica and Gypsum
Thanks and A nice article however using two different browsers no images to be seen.
  Topic: A mineralogical trip through the states of USA - Indiana
R Saunders

Replies: 132
Views: 121945

PostForum: A mineralogical trip through the states of USA   Posted: Oct 04, 2021 04:34   Subject: Re: A mineralogical trip through the states of USA - Indiana
Thank you for the information. It weighs 3 lb 1.5 oz = 1403.301395 grams and is still oily V's the above pieces that fit in my ultrasonic cleaner which removed much dirt and oil.
  Topic: A mineralogical trip through the states of USA - Indiana
R Saunders

Replies: 132
Views: 121945

PostForum: A mineralogical trip through the states of USA   Posted: Oct 03, 2021 08:25   Subject: Re: A mineralogical trip through the states of USA - Indiana
PYRITE : FeS2 from the Rensselear Quarry
Pleasant Ridge, Jasper Co., Indiana
Now closed and flooded.

Pyrite tubes and bitumen from the Devonian of Indiana,
Black = bitumen (petroleum residue ...
  Topic: Conditions where pyrite/pyritohedra are formed
R Saunders

Replies: 16
Views: 2660

PostForum: Minerals and Mineralogy   Posted: Oct 01, 2021 09:11   Subject: Re: Conditions where pyrite/pyritohedra are formed
I have a specimen with pyrite tubes. Do you know what causes that?
  Topic: A mineralogical trip through the states of USA - Indiana
R Saunders

Replies: 132
Views: 121945

PostForum: A mineralogical trip through the states of USA   Posted: Sep 22, 2021 12:56   Subject: Re: A mineralogical trip through the states of USA - Indiana
Item #3 marcasite / pyrite. after cleaning. Known for the oil shale and oil residue.
  Topic: A Tri-State Galena and Calcite
R Saunders

Replies: 9
Views: 2214

PostForum: Micros & Macros - Images of Minerals   Posted: Sep 22, 2021 10:56   Subject: Re: A Tri-State Galena and Calcite
Thank you, it was purchased at a rock show and was tagged that way.
  Topic: A Tri-State Galena and Calcite
R Saunders

Replies: 9
Views: 2214

PostForum: Micros & Macros - Images of Minerals   Posted: Sep 22, 2021 09:43   Subject: Re: A Tri-State Galena and Calcite
my records show that it weighs 108 grams.
  Topic: A mineralogical trip through the states of USA - Indiana
R Saunders

Replies: 132
Views: 121945

PostForum: A mineralogical trip through the states of USA   Posted: Sep 22, 2021 09:12   Subject: Re: A mineralogical trip through the states of USA - Indiana
PYRITE : FeS2 from the Rensselear Quarry
Pleasant Ridge, Jasper Co., Indiana
Marcasite on pyrite on a couple.

Item # 3
  Topic: A mineralogical trip through the states of USA - Indiana
R Saunders

Replies: 132
Views: 121945

PostForum: A mineralogical trip through the states of USA   Posted: Sep 20, 2021 08:31   Subject: Re: A mineralogical trip through the states of USA - Indiana
PYRITE : FeS2 from the Rensselear Quarry
Pleasant Ridge, Jasper Co., Indiana
Marcasite on pyrite on a couple.

#1 96 grams #2 268 grams
  Topic: Chalcedony?
R Saunders

Replies: 2
Views: 687

PostForum: What is it? - Where is it from?   Posted: Aug 23, 2021 10:54   Subject: Re: Chalcedony?
Chalcedony is a form of microcrystalline quartz and this looks like quartz, so it might contain chalcedony. I have no idea where it is from as it could be from millions of different places

Thanks ...
  Topic: Chalcedony?
R Saunders

Replies: 2
Views: 687

PostForum: What is it? - Where is it from?   Posted: Aug 23, 2021 08:23   Subject: Chalcedony?
I acquired this with no information. I have been told it is most likely Chalcedony. Fairly light weight and has a bit of a waxy feel. I would like to know where it may have come from, and what has cau ...
  Topic: A Tri-State Galena and Calcite
R Saunders

Replies: 9
Views: 2214

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 20, 2021 00:39   Subject: Re: A Tri-State Galena and Calcite

Mineral: Galena and Calcite
Locality: Tri-State District, Jasper County, Missouri, USA
Size:
Description:


Size please?


In storage and cannot measure it..
Bob
______________________ ...
  Topic: A Tri-State Galena and Calcite
R Saunders

Replies: 9
Views: 2214

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 18, 2021 14:08   Subject: A Tri-State Galena and Calcite
A Tri-State Galena and Calcite.
  Topic: Favourite Galenas?
R Saunders

Replies: 36
Views: 33524

PostForum: Favourite Minerals   Posted: Aug 18, 2021 08:52   Subject: Re: Favourite Galenas?
Are all of the mines in the Tri-State area now permanently closed? As per the U. S. health codes. Any Museums or visitor centers open. I know a lady that worked at one of the mines as did her father.
  Topic: Advice needed on how to get started on a potential project.
R Saunders

Replies: 6
Views: 1345

PostForum: Off-Topic and Introductions   Posted: Aug 04, 2021 10:39   Subject: Re: advice needed on how to get started on a potential project.
There are Facebook groups about cleaning minerals and such but unlikely to find someone from your area.
  Topic: Stay at home - Coronavirus / Covid-19
R Saunders

Replies: 364
Views: 136636

PostForum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF   Posted: Aug 01, 2021 04:45   Subject: Re: Corona COVID-19 virus - What is it ? Where is it from ?
While most of the article went over my head, I do feel that the virus must be blowing in the trade winds or the jet stream. Our face masks as we are told will only help catch the droplets we put out t ...
  Topic: Unknown quartz?
R Saunders

Replies: 0
Views: 1092

PostForum: What is it? - Where is it from?   Posted: Jul 28, 2021 15:43   Subject: Unknown quartz?
With further study it is a mineral with quartz crystals in the voids. A purchased item with no information.
  Topic: Favourite Galenas?
R Saunders

Replies: 36
Views: 33524

PostForum: Favourite Minerals   Posted: Jul 20, 2021 08:43   Subject: Re: Favourite Galenas?
Galena and Marcasite
Possible, Viburnum Trend, Reynolds Co., Missouri, United States
This is a very nice group of cubo-octahedral Galena crystals, the largest
with yellow-metallic marcasite crys ...
  Topic: Favourite Galenas?
R Saunders

Replies: 36
Views: 33524

PostForum: Favourite Minerals   Posted: Jul 20, 2021 01:56   Subject: Re: Favourite Galenas?
Another view
 
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