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Don Lum Collection
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Don Lum




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PostPosted: May 07, 2019 17:25    Post subject: Re: Don Lum Collection  

Bob Morgan wrote:
Looking through pics on mindat there are coatings of quartz and calcite. Yours looks like neither. The calcite coatings are of scalenahedral shaped crystals. Yours looks like simple rhombs.
Since both calcite and rhodochrosite are rhombohedral, I wouldn't rule out this simply being a rhodochrosite specimen.
It appears that the Oppu Mine produced both botryoidal and rather sharp crystals. Perhaps this is botryoidal overcoating of a prior generation of rhombs or three way blades.
'Just speculating. There's nothing really like yours on Mindat.



Bob,

Thank you for your idea. It looks like rhodochrosite on the bottom also. I see that Jordi agrees with your comment. I appreciate your taking the time to go through mindat and write me. I looked through mindat also and could not find anything that looked like this specimen either. This piece represents two generations of rhodochrosite.

Regards,

Don



P5021934 (2).JPG
 Mineral: Rhodochrosite
 Locality:
Oppu Mine, Nishimeya-mura, Naka-Tsugaru-gun, Aomori Prefecture, Tohoku Region, Honshu Island, Japan
 Dimensions: 15.2 cm x 11.7 cm x 4.7 cm
 Description:
Back of specimen posted on 05/02/2019. P5011921(2).jpg
 Viewed:  1388 Time(s)

P5021934 (2).JPG



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Don Lum




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PostPosted: May 07, 2019 18:11    Post subject: Re: Don Lum Collection  

Elmwood


P5021948 (2).JPG
 Mineral: Calcite, Fluorite, Dolomite
 Locality:
Elmwood Mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, Smith County, Tennessee, USA
 Dimensions: 21.5 cm x 11 cm x 10.5 cm
 Description:
Calcite, Micro Fluorite, Dolomite
 Viewed:  1386 Time(s)

P5021948 (2).JPG



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Niels Brouwer




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PostPosted: May 07, 2019 18:46    Post subject: Re: Don Lum Collection  

Once again an impressive specimen that fits very well in your excellent quality collection, Don.

You can be quite sure that no baryte was harmed in the making of this pseudomorph. :D If it's indeed a pseudomorph in the first place, it would seem to be one after a trigonal mineral species or similar, which pretty much excludes baryte as a candidate.


Edit: I meant the rhodochrosite of course, I had overlooked the additional posts on this new page. Love the subtle purple of that Elmwood calcite too!
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Don Lum




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PostPosted: May 07, 2019 19:07    Post subject: Re: Don Lum Collection  

Niels Brouwer wrote:
Once again an impressive specimen that fits very well in your excellent quality collection, Don.

You can be quite sure that no baryte was harmed in the making of this pseudomorph. :D If it's indeed a pseudomorph in the first place, it would seem to be one after a trigonal mineral species or similar, which pretty much excludes baryte as a candidate.


Edit: I meant the rhodochrosite of course, I had overlooked the additional posts on this new page. Love the subtle purple of that Elmwood calcite too!



Thank you for your nice comment, Niels. I hope you are well.

Regards,

Don

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Tobi




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PostPosted: May 08, 2019 01:17    Post subject: Re: Don Lum Collection  

Niels Brouwer wrote:
Once again an impressive specimen that fits very well in your excellent quality collection, Don.
I have nothing to add :-)
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Don Lum




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PostPosted: May 12, 2019 22:23    Post subject: Re: Don Lum Collection  

Tabular Quartz


P5121962 (2).JPG
 Mineral: Quartz
 Locality:
Montgomery County, Arkansas, USA
 Dimensions: 58 mm x 34 mm x 12 mm
 Description:
tabular quartz
 Viewed:  1242 Time(s)

P5121962 (2).JPG



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PostPosted: May 14, 2019 13:19    Post subject: Re: Don Lum Collection  

Amethyst


P5121951 (2).JPG
 Mineral: Quartz (variety amethyst)
 Locality:
Piedra Parada (Las Vigas), Municipio Tatatila, Veracruz (Veracruz de Ignacio de la Llave), Mexico
 Dimensions: 45 mm x 30 mm x 30 mm
 Description:
 Viewed:  1141 Time(s)

P5121951 (2).JPG



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PostPosted: May 16, 2019 16:30    Post subject: Re: Don Lum Collection  

Smithsonite


P5121968 (2).JPG
 Mineral: Smithsonite
 Locality:
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
 Dimensions: 18 mm x 18 mm x 13 mm
 Description:
 Viewed:  1030 Time(s)

P5121968 (2).JPG



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PostPosted: May 21, 2019 18:25    Post subject: Re: Don Lum Collection  

Tourmaline


IMG_7745 (2).JPG
 Mineral: Elbaite (Tourmaline Group), Albite
 Locality:
Mokhovaya pegmatite, Malkhan (Malchan), Krasnyi Chikoy, Chitinskaya Oblast', Transbaikalia (Zabaykalye), East Siberia Region, Russia
 Dimensions: 68 mm x 48 mm x 45 mm
 Description:
Elbaite (variety rubellite)
 Viewed:  915 Time(s)

IMG_7745 (2).JPG



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crosstimber
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PostPosted: May 22, 2019 08:41    Post subject: Re: Don Lum Collection  

Don,

Very nice elbaite from Malkhan. After reading the article on this locality in the most recent Min. Rec. it will no doubt make those of us who have such specimens in our collections appreciate them that much more.

Michael
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PostPosted: May 22, 2019 10:13    Post subject: Re: Don Lum Collection  

crosstimber wrote:
Don,

Very nice elbaite from Malkhan. After reading the article on this locality in the most recent Min. Rec. it will no doubt make those of us who have such specimens in our collections appreciate them that much more.

Michael



Michael, thank you. I appreciate both your comment and the elbaite.

Hi to Laura.

Don

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PostPosted: May 23, 2019 01:20    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Michael, thank you. I appreciate both your comment and the elbaite.
And I really appreciate that elbaite, Don! ;-)
Very fine specimen, I like those red tourmalines from Malkhan and I hope one day to have one in my collection.
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PostPosted: May 24, 2019 10:47    Post subject: Re: Don Lum Collection  

Tobi wrote:
Don Lum wrote:
Michael, thank you. I appreciate both your comment and the elbaite.
And I really appreciate that elbaite, Don! ;-)
Very fine specimen, I like those red tourmalines from Malkhan and I hope one day to have one in my collection.


Thank you very much, Tobi. I do hope you find one.

Regards,

Don

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PostPosted: May 25, 2019 15:42    Post subject: Re: Don Lum Collection  

Rhodochrosite


IMG_7946 (2).JPG
 Mineral: Rhodochrosite, Pyrite
 Locality:
Oppu Mine, Nishimeya-mura, Naka-Tsugaru-gun, Aomori Prefecture, Tohoku Region, Honshu Island, Japan
 Dimensions: 33 cm x 27 cm
 Description:
 Viewed:  599 Time(s)

IMG_7946 (2).JPG



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PostPosted: May 25, 2019 16:40    Post subject: Re: Don Lum Collection  

Chrysocolla pseudomorph


P5257953 (2).JPG
 Mineral: Chrysocolla after Gypsum or Azurite
 Locality:
Ray Mines, Scott Mountain area, Mineral Creek District, Dripping Spring Mountains, Pinal County, Arizona, USA
 Dimensions: 17 mm x 6 mm x 3 mm
 Description:
 Viewed:  573 Time(s)

P5257953 (2).JPG



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PostPosted: May 26, 2019 01:46    Post subject: Re: Don Lum Collection  

I really like that there's such a wide range in your collection: You show us a 33 cm Oppu Mine rhodo with the value of a small car which any museum would like to have. And next to this a tiny 1,7 cm pseudomorph from Ray Mine, I really appreciate that variety. Many collectors prefer a uniform size in their collection because that looks more appealing to them. My personal taste is different and rather like yours, I think specimens in different sizes look better ...

How many specimens do you have in your collection?

Regards
Tobi
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Don Lum




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PostPosted: May 26, 2019 13:01    Post subject: Re: Don Lum Collection  

Tobi wrote:
I really like that there's such a wide range in your collection: You show us a 33 cm Oppu Mine rhodo with the value of a small car which any museum would like to have. And next to this a tiny 1,7 cm pseudomorph from Ray Mine, I really appreciate that variety. Many collectors prefer a uniform size in their collection because that looks more appealing to them. My personal taste is different and rather like yours, I think specimens in different sizes look better ...

How many specimens do you have in your collection?

Regards
Tobi


Hi Tobi,

Thank you for your comment about the collection. I am not up to date with the curation of the collection so cannot give you a definite answer.

Sincerely,

Don

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PostPosted: May 26, 2019 14:06    Post subject: Re: Don Lum Collection  

Cuprosklodowskite


P5257957 (2).JPG
 Mineral: Cuprosklodowskite
 Locality:
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Congo DR (Zaire)
 Dimensions: 28 mm x 19 mm x 18 mm
 Description:
 Viewed:  458 Time(s)

P5257957 (2).JPG



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Don Lum




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PostPosted: May 26, 2019 17:42    Post subject: Re: Don Lum Collection  

Don Lum wrote:
Tobi wrote:
I really like that there's such a wide range in your collection: You show us a 33 cm Oppu Mine rhodo with the value of a small car which any museum would like to have. And next to this a tiny 1,7 cm pseudomorph from Ray Mine, I really appreciate that variety. Many collectors prefer a uniform size in their collection because that looks more appealing to them. My personal taste is different and rather like yours, I think specimens in different sizes look better ...

How many specimens do you have in your collection?

Regards
Tobi


Hi Tobi,

Thank you for your comment about the collection. I am not up to date with the curation of the collection so cannot give you a definite answer.

Sincerely,

Don


Tobi,

I want to add another thought to finish answering your question. I tend to gravitate toward specimens that I like and can afford without regard to its size. If I were to restrict my acquisitions to a particular size like some collectors do such as those who wish to enter mineral competition or because they just like a certain size, I would miss out on some minerals which I think are somewhat rare or good examples of that particular species. For example, I have a Baddeleyite after Kimzeyite with Perovskite, Anatase and Magnetite from Perovskite Hill in Magnet Cove, Arkansas. If I were to pass up on that specimen hoping that another larger one would come along in the future, I might still be waiting to get one. I think that some minerals that are desirable by me don't come in a larger size ( or not yet) ;-) Then there are other mineral specimens that come in a larger size but I am perfectly happy with a smaller one. The smaller the size the less the damage and more perfect is what my micromount friends say.

Regards,

Don

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PostPosted: May 26, 2019 17:48    Post subject: Re: Don Lum Collection  

Torbernite


P5268057 (2).JPG
 Mineral: Torbernite
 Locality:
Margabal Mine, Entraygues-sur-Truyère, Lot et Truyère, Rodez, Aveyron, Occitanie, France
 Dimensions: 41 mm x 25 mm x 25 mm
 Description:
 Viewed:  420 Time(s)

P5268057 (2).JPG



P5268059 (2).JPG
 Mineral: Torbernite
 Locality:
Margabal Mine, Entraygues-sur-Truyère, Lot et Truyère, Rodez, Aveyron, Occitanie, France
 Dimensions: 41 mm x 25 mm x 25 mm
 Description:
 Viewed:  422 Time(s)

P5268059 (2).JPG



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