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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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 Posted: Mar 24, 2016 11:04 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Brochantite |
| Locality: | | Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico |  |
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| Dimensions: | 5.8 x 7.9 cm |
| Description: |
| Lustrous dark green acicular brochantite crystals lining shallow pockets in an argillized white porphyry. Collected in January 2015. |
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27171 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Mar 28, 2016 14:33 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz |
| Locality: | | Goboboseb Mountains, Brandberg area, Erongo Region, Namibia | |
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| Dimensions: | 2.7 x 5.0 cm |
| Description: |
| A small group of glassy quartz crystals with pale amethyst and smoky zones, and numerous reddish-brown hematite inclusions. |
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27094 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 06, 2016 12:12 Post subject: Re: Collection of Michael Shaw |
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I just received word from Jordi that a recent analysis in Germany showed these 'mimetites' from the Gowd Mine to be vanadinite. Since these two minerals form a series, until I hear somethiing more definitive, I have labeled this specimen as Mimetite-Vanadinite series.
| Mineral: | Mimetite-Vanadinite series |
| Locality: | | Gowd Mine, Anarak District, Nain, Isfahan Province, Iran | |
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| Dimensions: | 6.8 x 9.1 cm |
| Description: |
| Prismatic yellow-orange hexagonal crystals to 0.5 cm scattered over a quartz and calcite matrix. |
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27022 Time(s) |
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| Mineral: | Mimetite-Vanadinite series |
| Locality: | | Gowd Mine, Anarak District, Nain, Isfahan Province, Iran | |
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| Dimensions: | 6.8 x 9.1 cm, FOV~4.0 cm |
| Description: |
| Closeup of the above specimen. |
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27110 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Apr 06, 2016 14:16 Post subject: Re: Collection of Michael Shaw |
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Very nice specimens Michael. Needless to say that I like your 'harlequin' quartz.
_________________
Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 06, 2016 16:32 Post subject: Re: Collection of Michael Shaw |
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| Pierre Joubert wrote: | | Very nice specimens Michael. Needless to say that I like your 'harlequin' quartz. |
Many thanks Pierre. I have never heard the term 'harlequin' quartz before, but it is certainly an apt description.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 15, 2016 15:51 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Nikolaevski Mine, Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai, Far-Eastern Region, Russia | |
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| Dimensions: | 4.2 x 7.1 cm |
| Description: |
| An intergrown group of three yellowish brown calcite crystals with low-angled rhomb terminations and a silky luster. Collected in summer 2015. |
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26423 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 18, 2016 08:56 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Galena |
| Locality: | | Smallcleugh Mine, Nenthead, Alston Moor District, North Pennines Orefield, former Cumberland, Cumbria, England / United Kingdom | |
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| Dimensions: | 4.0 x 8.3 cm |
| Description: |
| Several lead-gray cuboctahedral galena crystals scattered over an elongated piece of breccia. |
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26391 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Apr 18, 2016 10:07 Post subject: Re: Collection of Michael Shaw |
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| Very sweet galena!
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Apr 18, 2016 11:01 Post subject: Re: Collection of Michael Shaw - funny coincidence |
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Indeed very sweet, I love it! And how funny: It looks like the twin of MY galena from that mine, it has even the same size :-) :-) :-)
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26208 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 18, 2016 11:12 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: | | Indeed very sweet, I love it! And how funny: It looks like the twin of MY galena from that mine, it has even the same size :-) :-) :-) |
Thanks Bob. Tobi - the similarity of these 2 specimens is quite remarkable. Always nice to see another specimen from a collector who loves galena as much as myself. Thanks for showing yours.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 27, 2016 10:57 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Fluorapatite (Apatite Group) |
| Locality: | | Chhurka, Shigar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | 2.7 x 3.7 cm |
| Description: |
| Subparallel group of colorless glassy hexagonal fluorapatite crystals with druzy green vermiform muscovite nestled between the crystals. |
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30282 Time(s) |
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Edelmin
Joined: 24 Mar 2009
Posts: 43
Location: Salamanca
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| Posted: Apr 27, 2016 12:01 Post subject: Re: Collection of Michael Shaw |
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Hi Michael,
Very nice apatite, as most of your other specimens, all of great quality and aesthetics.
However I really doubt that it comes from Chumar Bakhoor, apatites from there are a bit different and quite characteristic. As the picture title states, yours is most probably from the Shigar Valley, being Chhurka a locality in that valley known for apatite. I suppose the locality change is related to the locality database and may be solved easily (adding Chhurka as a new locality).
Best regards,
Felix Garcia
_________________
Felix G. Garcia
Edelmin |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 27, 2016 15:21 Post subject: Re: Collection of Michael Shaw |
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Hi Felix,
Thanks for pointing out the error. You are absolutely correct as to the Chhurka locality. This error wasn't a result of the database. The error was mine as I copied the locality from a different specimen. It is now corrected.
Michael
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1534
Location: Catalonia
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| Posted: Apr 27, 2016 16:12 Post subject: Re: Collection of Michael Shaw |
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| crosstimber wrote: | | Hi Felix, Thanks for pointing out the error. You are absolutely correct as to the Chhurka locality. This error wasn't a result of the database. The error was mine as I copied the locality from a different specimen. It is now corrected. Michael |
Anyone interested in knowing where Chhurka is may want to open this map https://carlesmillan.cat/maps/Pakistan.png
Just a hamlet at the lower area of the Shigar Valley (blue pin), somewhere to the northeast of Skardu. Not hard to find on the map, in the lower right quarter.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2244
Location: Oklahoma
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| Posted: Apr 29, 2016 07:57 Post subject: Re: Collection of Michael Shaw |
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This one is from Chumar Bakhoor.
| Mineral: | Fluorapatite (Apatite Group) |
| Locality: | | Chumar Bakhoor, Hunza Valley, Nagar District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | 5.9 X 7.6, crystal is 1.5 cm |
| Description: |
| A compound glassy prismatic pink fluorapatite crystal with a pinacoid termination and modified beveled edges set on a matrix of silver muscovite. The crystal shows an intense yellow fluorescence under SW UV. |
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30058 Time(s) |
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