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Don Lum Collection
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Don Lum




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PostPosted: May 18, 2017 23:17    Post subject: Re: Don Lum Collection  

Quartz cabochon with copper sulfate liquid inclusions and bubbles


P5180872.JPG
 Mineral: Quartz
 Locality:
Bahia, Brazil
 Dimensions: 22mm x 19.5mm x 8.8mm
 Description:
Polished Quartz cabochon with copper sulfate liquid inclusions and bubbles
 Viewed:  3572 Time(s)

P5180872.JPG



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Don Lum




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PostPosted: May 19, 2017 17:12    Post subject: Re: Don Lum Collection  

I don't have a subscription to Gems and Gemology but here is a reference from a contributor from Barcelona to gemologyonline.com https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=20&t=20987 and I quote:

Elena Andia
Post subject: Blue fluid inclusions in quartzPostPosted: Wed Mar 04, 2015 5:23 pm
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Location: Barcelona (Spain)
Hi to everybody!

During our last trip to Brazil, we bought some colorless stones with blue fluid inclusions. Few days ago we analyzed one of the stones. With the distant vision method it could be observed a refractive index of 1.55 approximately. With the microscope it can be seen typical inclusions from natural gemstones (crystal inclusions, two-phase inclusions, etc.) and two blue fluid inclusions. Under long wave UV radiation this specimen displayed a bluish green fluorescence.

We were investigating and we found an issue of Gems & Gemology that talks about quartz with blue fluid inclusions (probably a saturated copper sulfate solution). Here you have the reference:

John I. Koivula, "Colored fluid inclusions in quartz", Gems and Gemology, Volume 42, Spring 2006, pages 71-72.

We think it is a very curious gemstone and we hope you like it.

What do you think about it?

End quote.

Cheers,

Don

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Tobi




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PostPosted: May 20, 2017 04:20    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Polished Quartz cabochon with copper sulfate liquid inclusions and bubbles
I really struggle to like a polished rock, but that one is quite interesting :-)
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Don Lum




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PostPosted: May 20, 2017 08:56    Post subject: Re: Don Lum Collection  

Tobi wrote:
Don Lum wrote:
Polished Quartz cabochon with copper sulfate liquid inclusions and bubbles
I really struggle to like a polished rock, but that one is quite interesting :-)


Tobi, thank you for your tolerance and understanding. I considered your feelings as well as those of Jordi and Carles before posting but decided that the larger FMF community would appreciate such a picture since it was alluded to in Roger's post and Cascaillou's comment.

Regards,

Don

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Don Lum




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PostPosted: May 29, 2017 15:12    Post subject: Re: Don Lum Collection  

Smithsonite


IMG_7264.JPG
 Mineral: Smithsonite after Dolomite
 Locality:
Monte Cristo Mine, Rush, Rush Creek District, Marion County, Arkansas, USA
 Dimensions: 110 mm x 51 mm x 52 mm
 Description:
 Viewed:  3285 Time(s)

IMG_7264.JPG



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PostPosted: May 29, 2017 15:23    Post subject: Re: Don Lum Collection  

Cerussite


IMG_7301.JPG
 Mineral: Cerussite
 Locality:
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
 Dimensions: 103 mm x 63 mm x 73 mm
 Description:
Cerussite Sixling
 Viewed:  3286 Time(s)

IMG_7301.JPG



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Don Lum




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PostPosted: May 30, 2017 19:38    Post subject: Re: Don Lum Collection  

Pyrite


P5290891.JPG
 Mineral: Pyrite
 Locality:
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
 Dimensions: 18 mm x 16 mm x 12 mm
 Description:
 Viewed:  3191 Time(s)

P5290891.JPG



P5290913.JPG
 Mineral: Pyrite
 Locality:
San Manuel Mine, San Manuel, San Manuel District, Pinal County, Arizona, USA
 Dimensions: 14 mm x 12 mm x 12 mm
 Description:
 Viewed:  3186 Time(s)

P5290913.JPG



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Tobi




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PostPosted: May 31, 2017 10:10    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Pyrite
Very uncommon and interesting pyrite crystals, Don!
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Fiebre Verde




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PostPosted: May 31, 2017 11:37    Post subject: Re: Don Lum Collection  

Tobi wrote:
Don Lum wrote:
Pyrite
Very uncommon and interesting pyrite crystals, Don!


yes, very!
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Don Lum




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PostPosted: May 31, 2017 12:03    Post subject: Re: Don Lum Collection  

Thank you very much for your comments Tobi and Gérard.
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PostPosted: Jun 03, 2017 15:00    Post subject: Re: Don Lum Collection  

Mimetite


P5290929.JPG
 Mineral: Mimetite
 Locality:
Hat Yai District, Songkhla Province, Thailand
 Dimensions: 21 mm x 13 mm x 8 mm
 Description:
Hoppered Mimetite crystal
 Viewed:  2798 Time(s)

P5290929.JPG



P5290928.JPG
 Mineral: Mimetite
 Dimensions: 21 mm x 13 mm x 8 mm
 Description:
Hoppered Mimetite crystal
 Viewed:  2793 Time(s)

P5290928.JPG



P5290934.JPG
 Mineral: Mimetite
 Dimensions: 21 mm x 13 mm x 8 mm
 Description:
Hoppered Mimetite crystal
 Viewed:  2794 Time(s)

P5290934.JPG



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Don Lum




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PostPosted: Jun 03, 2017 22:30    Post subject: Re: Don Lum Collection  

Previously posted, better pictures


P6030942.JPG
 Mineral: Rhodochrosite, Copper
 Locality:
Wolf Mine, Herdorf, Siegerland, Rhineland-Palatinate/Rheinland-Pfalz, Germany
 Dimensions: 45 mm x 50 mm x 27 mm
 Description:
Rhodochrosite with Native Copper on Limonite ex Howard Belsky ex Norman E. Dawson collected pre-1910
 Viewed:  2767 Time(s)

P6030942.JPG



P6030950.JPG
 Mineral: Rhodochrosite, Copper
 Locality:
Wolf Mine, Herdorf, Siegerland, Rhineland-Palatinate/Rheinland-Pfalz, Germany
 Dimensions: 45 mm x 50 mm x 27 mm
 Description:
Rhodochrosite with Native Copper on Limonite ex Howard Belsky ex Norman E. Dawson collected pre-1910
 Viewed:  2767 Time(s)

P6030950.JPG



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Tobi




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PostPosted: Jun 04, 2017 08:05    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Previously posted, better pictures
A perfect specimen of Germany's (and maybe even Europe's) most famous rhodochrosites, superb crystals!
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Don Lum




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PostPosted: Jun 04, 2017 11:05    Post subject: Re: Don Lum Collection  

Tobi wrote:
Don Lum wrote:
Previously posted, better pictures
A perfect specimen of Germany's (and maybe even Europe's) most famous rhodochrosites, superb crystals!


Thank you very much, Tobi. I consider you an expert on German minerals so I consider your words as a high compliment.

Regards,

Don

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Don Lum




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PostPosted: Jun 04, 2017 11:24    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Tobi wrote:
Don Lum wrote:
Previously posted, better pictures
A perfect specimen of Germany's (and maybe even Europe's) most famous rhodochrosites, superb crystals!


Thank you very much, Tobi. I consider you an expert on German minerals so I consider your words as a high compliment.

Regards,

Don


I should have described this specimen as scalenohedrons of rhodochrosite with patinaed native copper in a vug with limonite.

Don

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PostPosted: Jun 05, 2017 02:17    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Tobi wrote:
A perfect specimen of Germany's (and maybe even Europe's) most famous rhodochrosites, superb crystals!
Thank you very much, Tobi. I consider you an expert on German minerals so I consider your words as a high compliment. Regards, Don
Thanks, Don. Maybe not an expert, but someone who loves German minerals and whose knowledge about them may be slightly above average :-)
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PostPosted: Jun 09, 2017 15:15    Post subject: Re: Don Lum Collection  

Smithsonite from good ole Arkansas

one repeat but better picture



IMG_7313.JPG
 Mineral: Smithsonite after Dolomite
 Locality:
Monte Cristo Mine, Rush, Rush Creek District, Marion County, Arkansas, USA
 Dimensions: 110 mm x 51 mm x 52 mm
 Description:
 Viewed:  2496 Time(s)

IMG_7313.JPG



P6030962.JPG
 Mineral: Smithsonite, Quartz
 Locality:
Monte Cristo Mine, Rush, Rush Creek District, Marion County, Arkansas, USA
 Dimensions: 49 mm x 34 mm x 21 mm
 Description:
Smithsonite on Quartz
 Viewed:  2494 Time(s)

P6030962.JPG



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PostPosted: Jun 10, 2017 22:38    Post subject: Re: Don Lum Collection  

Chrysoberyl (variety Alexandrite)


P6100994.JPG
 Mineral: Chrysoberyl (variety Alexandrite)
 Locality:
Novello Mine, Masvingo (Fort Victoria), Masvingo District, Masvingo Province, Zimbabwe
 Dimensions: 34 mm x 24 mm x 17 mm
 Description:
Sixling Twin, incandescent
 Viewed:  2410 Time(s)

P6100994.JPG



P6101022.JPG
 Mineral: Chrysoberyl (variety Alexandrite)
 Locality:
Novello Mine, Masvingo (Fort Victoria), Masvingo District, Masvingo Province, Zimbabwe
 Dimensions: 34 mm x 24 mm x 17 mm
 Description:
Sixling Twin, 6500K
 Viewed:  2413 Time(s)

P6101022.JPG



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crosstimber
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PostPosted: Jun 11, 2017 15:08    Post subject: Re: Don Lum Collection  

We looked through quite a few of these in Tucson. Most were poorly crystallized and failed to demonstrate a good color change. Yours is nice on both counts - congrats.
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Don Lum




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PostPosted: Jun 11, 2017 15:56    Post subject: Re: Don Lum Collection  

crosstimber wrote:
We looked through quite a few of these in Tucson. Most were poorly crystallized and failed to demonstrate a good color change. Yours is nice on both counts - congrats.


Thank you, Michael. I took a few more pictures of this specimen today and if they are better, I will post later.

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