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09 Jul-14:07:01 Re: don lum collection (Don Lum)
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07 Jul-13:51:12 Popular minerals - laurentthomasite (Jordi Fabre)
07 Jul-13:40:22 Re: don lum collection (Don Lum)
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Don Lum Collection
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Pierre Joubert




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PostPosted: May 31, 2014 16:39    Post subject: Re: Don Lum Collection  

Congratulations on your nice Brandberg amethyst Don.
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PostPosted: May 31, 2014 17:58    Post subject: Re: Don Lum Collection  

Pierre Joubert wrote:
Congratulations on your nice Brandberg amethyst Don.

Thank you very much, Pierre. I hope Riana is feeling better.

Regards,

Don

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PostPosted: Jun 01, 2014 13:41    Post subject: Re: Don Lum Collection  

Mr. John S. White published an article in the May/June issue of Rocks and Minerals on Polyhedroid Agates. This inspired me to look at the few pieces that I collected a number of years ago and to my surprise was able to find them. Mr. White writes about how they are formed and the other names which one might find in the literature such as pseudo-agate, polyhydrolithe, and polyhedric quartz or quartz polyhedroids or even box quartz. Other names which are used are Paraiba-agate and polygonal quartz.

Mr. White notes, "The most famous and probably the most prolific source for polyhedroids is the Garguelo Farm south-southwest of Cajazeiras, in the Municipe de Cachieura dos Indios, Paraiba, Brazil."

My specimens came with a label Paraiba, Brazil as the location. They are polished slices.



IMG_3069.JPG
 Description:
Quartz variety agate
Paraiba, Brazil
16.7 x 5.7 cm
Polyhedroid agate
 Viewed:  20204 Time(s)

IMG_3069.JPG



IMG_3071.JPG
 Description:
Quartz variety agate
Paraiba, Brazil
10 .2 x 9.3 cm
Polyhedroid agate
 Viewed:  20218 Time(s)

IMG_3071.JPG



IMG_3077.JPG
 Description:
Quartz variety agate
Paraiba, Brazil
9.3 x 6.5 cm
Polyhedroid agate
 Viewed:  20216 Time(s)

IMG_3077.JPG



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Pierre Joubert




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PostPosted: Jun 02, 2014 03:05    Post subject: Re: Don Lum Collection  

Hi Don. I find these agates fascinating (the outward facets). Thank you for showing.
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Don Lum




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PostPosted: Jun 02, 2014 09:21    Post subject: Re: Don Lum Collection  

Pierre Joubert wrote:
Hi Don. I find these agates fascinating (the outward facets). Thank you for showing.


Hello Pierre,

Thank you for for nice comment.

I have been enjoying your posts and unusual finds.

Hello to Riana.

Don

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Pierre Joubert




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PostPosted: Jun 02, 2014 12:21    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Pierre Joubert wrote:
Hi Don. I find these agates fascinating (the outward facets). Thank you for showing.


Hello Pierre,

Thank you for for nice comment.

I have been enjoying your posts and unusual finds.

Hello to Riana.

Don


Hi Don. Thank you for your kind regards. I searched these agates and found Mr. White's article.
https://www.rocksandminerals.org/Back%20Issues/2014/May-June%202014/mineral-mysteries-abstract.html

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Don Lum




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PostPosted: Jun 02, 2014 12:57    Post subject: Re: Don Lum Collection  

Hi Don. Thank you for your kind regards. I searched these agates and found Mr. White's article.
https://www.rocksandminerals.org/Back%20Issues/2014/May-June%202014/mineral-mysteries-abstract.html[/quote]

Thank you Pierre.

Don

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Don Lum




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PostPosted: Jun 02, 2014 13:13    Post subject: Re: Don Lum Collection  

Polyhedroid Agates


IMG_3081.JPG
 Description:
Quartz var agate
Paraiba, Brazil
10.2 x 5.3 cm
Polyhedroid Agate
 Viewed:  20238 Time(s)

IMG_3081.JPG



IMG_3083.JPG
 Description:
Quartz var agate
Paraiba, Brazil
12.5 x 8.3 cm
Polyhedroid Agate
 Viewed:  20162 Time(s)

IMG_3083.JPG



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PostPosted: Jun 03, 2014 13:41    Post subject: Re: Don Lum Collection  

Goethite (FeO(OH) named after the German polymath and poet Johann Wolfgang von Goethe (1749–1832), an iron bearing hydroxide mineral of the diaspore group, is found in soil and other low-temperature environments. Goethite has been well known since prehistoric times for its use as a pigment (ochre). Evidence has been found of its use in paint pigment samples taken from the caves of Lascaux in France. It was first described in 1806 for occurrences in the Hollertszug Mine, Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany. (ref Wikipedia)


IMG_3042.JPG
 Description:
Goethite, Quartz
Amerzgane, Ouarzazate Province, Souss-Massa-Draa Region, Morocco
15 x 12 cm, 12.7 x 8.6 cm
Concave geode lined with colorless quartz crystals with sprays of divergent and radiating black lustrous metallic clusters of acicular goethite crystals.
 Viewed:  20007 Time(s)

IMG_3042.JPG



IMG_3045.JPG
 Description:
Goethite, Quartz
Amerzgane, Ouarzazate Province, Souss-Massa-Draa Region, Morocco
15 x 12 cm, 12.7 x 8.6 cm
 Viewed:  20045 Time(s)

IMG_3045.JPG



IMG_3046.JPG
 Description:
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm
 Viewed:  19981 Time(s)

IMG_3046.JPG



IMG_3055.JPG
 Description:
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm
 Viewed:  20013 Time(s)

IMG_3055.JPG



IMG_3058.JPG
 Description:
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm
 Viewed:  20050 Time(s)

IMG_3058.JPG



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Michael Shaw
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PostPosted: Jun 03, 2014 14:50    Post subject: Re: Don Lum Collection  

That is a nice group of polyhedroids Don. Made all the more interesting by John White's recent article in R&M.

Michael
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PostPosted: Jun 03, 2014 14:56    Post subject: Re: Don Lum Collection  

crosstimber wrote:
That is a nice group of polyhedroids Don. Made all the more interesting by John White's recent article in R&M.

Michael


Thank you, Michael. I enjoyed Mr. White's article.

Hello to Laura.

Don

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PostPosted: Jun 04, 2014 12:55    Post subject: Re: Don Lum Collection  

Goethite


IMG_3059.JPG
 Description:
Goethite
Montreal Mine, 35th Level, Montreal, Iron County, Wisconsin, USA
8.7 x 5.1 cm
 Viewed:  19946 Time(s)

IMG_3059.JPG



IMG_3063.JPG
 Description:
Goethite
Montreal Mine, 35th Level, Montreal, Iron County, Wisconsin, USA
8.7 x 5.1 cm
 Viewed:  20161 Time(s)

IMG_3063.JPG



IMG_3067.JPG
 Description:
Goethite
Garland County, Arkansas, USA
6.7 x 4.3 cm
 Viewed:  19973 Time(s)

IMG_3067.JPG



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PostPosted: Jun 06, 2014 20:04    Post subject: Re: Don Lum Collection  

Amazonite and Smoky Quartz


IMG_3012.JPG
 Description:
Microcline var amazonite, Quartz var smoky
Bear Creek,, El Paso County, Colorado, USA
9 x 8.7 cm
 Viewed:  19795 Time(s)

IMG_3012.JPG



IMG_3014.JPG
 Description:
Microcline var amazonite, Quartz var smoky
Bear Creek,, El Paso County, Colorado, USA
9 x 8.7 cm.
 Viewed:  19815 Time(s)

IMG_3014.JPG



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PostPosted: Jun 06, 2014 20:13    Post subject: Re: Don Lum Collection  

Copper


IMG_3085.JPG
 Description:
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals
 Viewed:  19806 Time(s)

IMG_3085.JPG



IMG_3091.JPG
 Description:
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals
 Viewed:  19790 Time(s)

IMG_3091.JPG



IMG_3096.JPG
 Description:
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals
 Viewed:  19823 Time(s)

IMG_3096.JPG



IMG_3100_1.JPG
 Description:
Copper
Phoenix Mine, Phoenix, Keweenaw County, Michigan, USA
5.0 x 3.0 cm
 Viewed:  19810 Time(s)

IMG_3100_1.JPG



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PostPosted: Jun 07, 2014 06:40    Post subject: Re: Don Lum Collection  

Copper


IMG_3111_1.JPG
 Description:
Copper
Ray Mine, Pinal County, Arizona, USA
5.3 x 4.0 cm
 Viewed:  19752 Time(s)

IMG_3111_1.JPG



IMG_3115_1.JPG
 Description:
Copper
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
5.1 x 4.8 cm
 Viewed:  19781 Time(s)

IMG_3115_1.JPG



IMG_3104_1.JPG
 Description:
Copper, Cuprite
Rubtsovskoe Cu-Zn-Pb Deposit, Rudnyi Altai, Altaiskii Krai, Western-Siberian Region, Russia
6.0 x 3.0 cm
 Viewed:  19746 Time(s)

IMG_3104_1.JPG



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PostPosted: Jun 07, 2014 09:09    Post subject: Re: Don Lum Collection  

Nice cubic copper crystals from the Cole Shaft.
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PostPosted: Jun 07, 2014 09:17    Post subject: Re: Don Lum Collection  

crosstimber wrote:
Nice cubic copper crystals from the Cole Shaft.


Thank you, Michael.

Hello to Laura.

Don

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PostPosted: Jun 07, 2014 18:03    Post subject: Re: Don Lum Collection  

Re-do of previously posted specimen. Better picture.


IMG_3190.JPG
 Description:
Copper
Phoenix Mine, Phoenix, Keweenaw County, Michigan, USA
5.0 x 3.0 cm
 Viewed:  19612 Time(s)

IMG_3190.JPG



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PostPosted: Jun 08, 2014 10:16    Post subject: Re: Don Lum Collection  

Copper


IMG_3117.JPG
 Description:
Copper
Ojibway Mine, Ojibway, Keweenaw County, Michigan, USA
4.3 x 3.3 cm
 Viewed:  19612 Time(s)

IMG_3117.JPG



IMG_3122.JPG
 Description:
Copper
Central Mine, Central, Keweenaw County, Michigan, USA
4.3 x 3.1 cm
 Viewed:  19581 Time(s)

IMG_3122.JPG



IMG_3126.JPG
 Description:
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm
 Viewed:  19558 Time(s)

IMG_3126.JPG



IMG_3129.JPG
 Description:
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm
 Viewed:  19576 Time(s)

IMG_3129.JPG



IMG_3131.JPG
 Description:
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm
 Viewed:  19578 Time(s)

IMG_3131.JPG



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PostPosted: Jun 08, 2014 10:27    Post subject: Re: Don Lum Collection  

I have a soft spot for Michigan coppers ever since I collected there as a boy many years ago. I love the crystallization on your Ojibway copper - nice piece.

Michael
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