Mindat Mineralogy Messageboard - Best Minerals

Mindat Mineralogy Messageboard - Best Minerals - Gypsum http://www.mindat.org/msgboard-97.html Fri, 27 Nov 2009 13:57:10 +0000 Phorum 5.2.8-RC1 http://www.mindat.org/forum.php?read,97,145889,145889#msg-145889 Gypsum, Canada (2 replies) http://www.mindat.org/forum.php?read,97,145889,145889#msg-145889

Gypsum
Canada


Gypsum, Red River Floodway, Winnipeg, Manitoba, Canada ~3cm wide	© Rob Lavinsky

Here will go general comments about Canadian Gypsum specimens]]> Rock Currier Best Minerals - Gypsum Tue, 21 Jul 2009 23:11:42 +0000 http://www.mindat.org/forum.php?read,97,141976,141976#msg-141976 Gypsum, Peru (no replies) http://www.mindat.org/forum.php?read,97,141976,141976#msg-141976
Rock,
I would be happy to provide specimen photos and text about the following locations if you would like to create the threads.

1) Marlow, Stephens County, Oklahoma
2) Salt Plains Lake, near Jet, Alfalfa County, Oklahoma
3) Salinas Paracas, Ica Department, Peru
4) Boldut Mine, Cavnic, Maramures, Romania

One of our Canadian members should be able to develop Red River Floodway, Winnipeg, Manitoba. If not I can do a little research and handle this site as well.

Karl, thanks for catching my error. The gypsum locality on Little Beaver Creek is no longer there, thus extinct, not extant.

Michael Shaw]]> Rock Currier Best Minerals - Gypsum Wed, 17 Jun 2009 20:44:49 +0000 http://www.mindat.org/forum.php?read,97,141975,141975#msg-141975 Gypsum, Romania (9 replies) http://www.mindat.org/forum.php?read,97,141975,141975#msg-141975

Rock,
I would be happy to provide specimen photos and text about the following locations if you would like to create the threads.

1) Marlow, Stephens County, Oklahoma
2) Salt Plains Lake, near Jet, Alfalfa County, Oklahoma
3) Salinas Paracas, Ica Department, Peru
4) Boldut Mine, Cavnic, Maramures, Romania

One of our Canadian members should be able to develop Red River Floodway, Winnipeg, Manitoba. If not I can do a little research and handle this site as well.

Karl, thanks for catching my error. The gypsum locality on Little Beaver Creek is no longer there, thus extinct, not extant.

Michael Shaw]]> Rock Currier Best Minerals - Gypsum Tue, 23 Jun 2009 20:09:13 +0000 http://www.mindat.org/forum.php?read,97,141974,141974#msg-141974 Gypsum, USA (10 replies) http://www.mindat.org/forum.php?read,97,141974,141974#msg-141974

Rock,
I would be happy to provide specimen photos and text about the following locations if you would like to create the threads.

1) Marlow, Stephens County, Oklahoma
2) Salt Plains Lake, near Jet, Alfalfa County, Oklahoma
3) Salinas Paracas, Ica Department, Peru
4) Boldut Mine, Cavnic, Maramures, Romania

One of our Canadian members should be able to develop Red River Floodway, Winnipeg, Manitoba. If not I can do a little research and handle this site as well.

Karl, thanks for catching my error. The gypsum locality on Little Beaver Creek is no longer there, thus extinct, not extant.

Michael Shaw]]> Rock Currier Best Minerals - Gypsum Tue, 21 Jul 2009 20:56:37 +0000 http://www.mindat.org/forum.php?read,97,141972,141972#msg-141972 Gypsum, France (no replies) http://www.mindat.org/forum.php?read,97,141972,141972#msg-141972

Probably should mention the huge gypsum deposits in the Paris basin ("plaster of Paris"). Some fine crystals continue to be found around Paris. Parts of the city are underlain by underground gypsum mines (largely abandoned I believe). This 16-centimeter twinned crystal was dug up in the Montmarte District during installation of an underground electric cable in about 1997. A higher resolution image is posted on Mindat at [http://www.mindat.org/photo-236492.html].

[Kelly Nash 2009]
]]> Rock Currier Best Minerals - Gypsum Wed, 17 Jun 2009 20:41:43 +0000 http://www.mindat.org/forum.php?read,97,134697,134697#msg-134697 Gypsum - Australia (no replies) http://www.mindat.org/forum.php?read,97,134697,134697#msg-134697
Gypsum
Ca[SO4].2H2O Monoclinic


Pernatty Lagoon, South Australia	© Rob Lavinsky

Coombah, Windeyer Co., New South Wales, Australia


Pernatty Lagoon, South Australia	© 2002 John H. Betts

[www.mindat.org]

Woolcunda Station, Windeyer Co., New South Wales, Australia


##	© Greg Murray

[www.mindat.org]

North Mine, Broken Hill, Yancowinna Co., New South Wales, Australia


##	© Greg Murray

http://www.mindat.org/photo-44078.html

Mt Elliott Mine, Selwyn District, Mt Isa - Cloncurry area, Queensland, Australia


##	©

[www.mindat.org]

Mount Gunson Mine, Mt Gunson, Stuart Shelf area, Andamooka Ranges - Lake Torrens area, South Australia, Australia


##	© Alan Goldstein

http://www.mindat.org/photo-51601.html

Pernatty Lagoon, Mt Gunson, Stuart Shelf area, Andamooka Ranges - Lake Torrens area, South Australia, Australia


##	© Rob Lavinsky

http://www.mindat.org/photo-49987.html


##	© Dan Weinrich

http://www.mindat.org/photo-133488.html


##	© Rob Lavinsky

http://www.mindat.org/photo-164942.html

Wirrulla, Ceduna region - Nullarbor Plain, South Australia, Australia


crystal with 5cm	© Martins da Pedra

http://www.mindat.org/photo-83418.html

Selenite crystal with 5cm

Sinclairs Gap Lake, Middleback Range, Eyre peninsula, South Australia, Australia


10.8 x 9.8 x 6.0 cm	© Rob Lavinsky

http://www.mindat.org/photo-137964.html

10.8 x 9.8 x 6.0 cm. A UNIQUE and DRAMATIC herringbone-shaped CABINET cluster of lustrous and translucent, light brown gypsum blades. The cluster looks like a Christmas tree and the blades reach 6.7 cm.

Whyalla, Middleback Range, Eyre Peninsula, South Australia, Australia


##	© Phil B.

http://www.mindat.org/photo-112763.html


##	© Rob Lavinsky

http://www.mindat.org/photo-164953.html

Lake Gilles, Corunna Station, Lake Gairdner - Gawler Ranges area, South Australia, Australia


##	© Rob Lavinsky

http://www.mindat.org/photo-43254.html
A HIGHLY UNUSUAL, nearly transparent, colorless and doubly terminated hourglass twinned gypsum crystal from the famous Lake Gilles of South Australia, Australia. Lake Gilles produces some of the most unusual gypsum crystal forms in the world.


##	© Rob Lavinsky

http://www.mindat.org/photo-170716.html

Lake Bumbunga, Lochiel, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia


25mm long	© R. Bottrill

http://www.mindat.org/photo-207883.html
A twinned gypsum "fish" with mud inclusions, found in the muds of the salt lake at Lochiel. About 25mm long.

Dead Horse Bay, Pine Point, Yorke Peninsula, South Australia, Australia

10,5 x 9,5 x 5 cm © Nuno Miguel Santos
http://www.mindat.org/photo-220974.html

Approx, size 10,5 x 9,5 x 5 cm

Bolton, Victoria, Australia


Field of view: 13.5cm	© Judy Rowe

[www.mindat.org]

Gypsum from a small salt lake at Bolton. This habit has been described as being like pom-poms. Field of view: 13.5cm.

Myall Lakes Reserve, Chinkapook, Victoria, Australia


Height of specimen 15cm	© Ryan Eagle

[www.mindat.org]

Height of specimen 15cm.

Swan Hill, Victoria, Australia


20x15x12 cm	© 2002 John H. Betts

[www.mindat.org]
Large cluster of translucent selenite crystals with yellow internal zones below the terminations. Very aesthetic formation. No damage. From my personal collection. Overall size of mineral specimen: 20x15x12 cm. Size of individual crystals: 5-80 mm.


##	© Tony Peterson

[www.mindat.org]

Chinkapook Lake, Swan Hill, Victoria, Australia


crystals to 26 mm	© 2007 Peter Cristofono

[www.mindat.org]

Gypsum crystals to 26 mm.

Lake Goongarrie, Comet Vale Township, Western Australia, Australia


10 x 7,5 x 5 cm	© Nuno Miguel Santos

[www.mindat.org]

Approx, size 10 x 7,5 x 5 cm

Salt Lake City, Kalgoorlie, Kalgoorlie-Boulder City, Western Australia, Australia


7,5 x 8,5 x 7,5 cm

[www.mindat.org]

Approx, size 7,5 x 8,5 x 7,5 cm

Water Tank Hill mine, Mount Magnet, Western Australia, Australia


5,5 x 3,5 x 2 cm	©

[www.mindat.org]

Approx, size 5,5 x 3,5 x 2 cm]]> Ralph Bottrill Best Minerals - Gypsum Thu, 16 Apr 2009 00:59:41 +0000 http://www.mindat.org/forum.php?read,97,134097,134097#msg-134097 Gypsum, Australia (no replies) http://www.mindat.org/forum.php?read,97,134097,134097#msg-134097 Ca[SO4].2H2O Monoclinic

Coombah, Windeyer Co., New South Wales, Australia
[www.mindat.org]

Woolcunda Station, Windeyer Co., New South Wales, Australia
[www.mindat.org]

North Mine, Broken Hill, Yancowinna Co., New South Wales, Australia
[www.mindat.org]

Mt Elliott mine, QLD

Mount Gunson Mine, Mt Gunson, Stuart Shelf area, Andamooka Ranges - Lake Torrens area, South Australia, Australia
[www.mindat.org]

Pernatty Lagoon, Mt Gunson, Stuart Shelf area, Andamooka Ranges - Lake Torrens area, South Australia, Australia
[www.mindat.org]
[www.mindat.org]
[www.mindat.org]

Wirrulla, Ceduna region - Nullarbor Plain, South Australia, Australia
[www.mindat.org]

Selenite crystal with 5cm - November of 2006

Sinclairs Gap Lake, Middleback Range, Eyre peninsula, South Australia, Australia
[www.mindat.org]

10.8 x 9.8 x 6.0 cm. A UNIQUE and DRAMATIC herringbone-shaped CABINET cluster of lustrous and translucent, light brown gypsum blades. The cluster looks like a Christmas tree and the blades reach 6.7 cm.

Whyalla, Middleback Range, Eyre Peninsula, South Australia, Australia
[www.mindat.org]
[www.mindat.org]

Lake Gilles, Corunna Station, Lake Gairdner - Gawler Ranges area, South Australia, Australia
[www.mindat.org]
A HIGHLY UNUSUAL, nearly transparent, colorless and doubly terminated hourglass twinned gypsum crystal from the famous Lake Gilles of South Australia, Australia. Lake Gilles produces some of the most unusual gypsum crystal forms in the world.
[www.mindat.org]

Lake Bumbunga, Lochiel, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia
[www.mindat.org]
A twinned gypsum "fish" with mud inclusions, found in the muds of the salt lake at Lochiel. About 25mm long.

Dead Horse Bay, Pine Point, Yorke Peninsula, South Australia, Australia
[www.mindat.org]

Approx, size 10,5 x 9,5 x 5 cm

Bolton, Victoria, Australia
[www.mindat.org]

Gypsum from a small salt lake at Bolton. This habit has been described as being like pom-poms. Field of view: 13.5cm.

Myall Lakes Reserve, Chinkapook, Victoria, Australia
[www.mindat.org]

Height of specimen 15cm.

Swan Hill, Victoria, Australia
[www.mindat.org]
Large cluster of translucent selenite crystals with yellow internal zones below the terminations. Overall size of mineral specimen: 20x15x12 cm. Size of individual crystals: 5-80 mm.
[www.mindat.org]

Chinkapook Lake, Swan Hill, Victoria, Australia
[www.mindat.org]

Gypsum crystals to 26 mm.

Lake Goongarrie, Comet Vale Township, Western Australia, Australia
[www.mindat.org]

Approx, size 10 x 7,5 x 5 cm

Salt Lake City, Kalgoorlie, Kalgoorlie-Boulder City, Western Australia, Australia
[www.mindat.org]

Approx, size 7,5 x 8,5 x 7,5 cm

Water Tank Hill mine, Mount Magnet, Western Australia, Australia
[www.mindat.org]

Approx, size 5,5 x 3,5 x 2 cm]]> Ralph Bottrill Best Minerals - Gypsum Sun, 12 Apr 2009 14:16:46 +0000 http://www.mindat.org/forum.php?read,97,129436,129436#msg-129436 Gypsum, United Kingdom (4 replies) http://www.mindat.org/forum.php?read,97,129436,129436#msg-129436

Gypsum Display collections.
CaSO₄^.2H₂O monoclinic
Here will go general information about gypsum. We need someone to step up and write the general notes so we can all complain about them and tell him/her about what they missed out on.

Gypsum
UK
England
Sussex, Mountfield, Mountfield Mine


Gypsum from Mountfield Mine, 13cm. J.Ralph collection	© J.Ralph


Gypsum from Mountfield Mine, 7cm. J.Ralph collection	© J.Ralph

Gypsum is one of the few minerals where notable crystals have been found in the south-east of England. Although good crystals can be found in many of the sand and clay deposits from Jurassic to recent ages in the South East, by far the best individual crystals and clear crystalline masses have come from the (now closed) Mountfield Mine in Sussex.

[Jolyon Ralph, Rock Currier]

Gypsum
UK
England
East Sussex, Newhaven
Individual crystals to over 30cm (1 foot) have been collected in situ from the top of the cliffs above the beach at Newhaven, East Sussex, from a sandy deposit overlaying the chalk. Large nodules of Aluminite have also been found here. Signs on the beach immediately below the cliff erected in recent years specifically prohibit collecting now.
[Jolyon Ralph]]]> Jolyon Ralph Best Minerals - Gypsum Mon, 16 Mar 2009 00:04:33 +0000 http://www.mindat.org/forum.php?read,97,129399,129399#msg-129399 Best Minerals Gypsum - Welcome (10 replies) http://www.mindat.org/forum.php?read,97,129399,129399#msg-129399
Ideally what we want to know about each significant mineral from each locality is:

1. What is the largest crystal of the mineral that the locality has produced?
2. What do the best specimens from this locality look like and where can one be seen?
3. Does the locality produce a variety of different kinds of specimens of this species, and what do the best of each type look like and how many of them were found etc.
4. What are the associated minerals found with this species and what is its geological setting?
5. How abundant are these specimens and when were they found? A type locality? In other words, how rare are they.
6. How do they compare to other specimens of the same mineral from other localities?
7. How much is it worth. This should probably be optional, but in cases where specimens are worth thousands of dollars we should probably say something of the value of these things.
8. What kind of care and feeding do these specimens require? Are they delicate, radioactive, unstable, color changeable etc.?
9. Are the specimens commonly faked, and if so, how to tell if they are?
10. Are there any interesting stories relating to the collecting of these specimens or their discovery as a new mineral?

Of course this is in reality impractical, but if we keep these questions in mind, we will do a lot better job when writing about them.]]> Rock Currier Best Minerals - Gypsum Tue, 21 Jul 2009 11:22:39 +0000