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crosstimber
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Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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 Posted: Sep 28, 2017 20:36 Post subject: Re: Collection of Michael Shaw |
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| Bob Harman wrote: | MICHAEL, Nice example. I have several similar pyrite specimens from Duff's Quarry. I too etched some calcite from one of them.
Is there any specific reason your example still has a small remaining area of obviously acid etched calcite? Why not carefully etch it away with some vinegar?
Regards, BOB |
Hi Bob,
No specific reason other than that's the way it came to me. I have thought about etching the remaining calcite away, but I suppose it serves to demonstrate the paragenesis at this location.
Cheers,
Michael
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crosstimber
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Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Sep 29, 2017 13:57 Post subject: Re: Collection of Michael Shaw |
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During the past 18 months, these purple grape chalcedony specimens have become commonplace in the stock of many dealers. Finding one that stands out among many hundreds if not thousands of pieces requires patience and persistence.
| Mineral: | Chalcedony |
| Locality: | | Mamuju area, Sulawesi Barat Province, Sulawesi, Indonesia |  |
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| Dimensions: | 2.5 x 4.2 x 6.3 cm |
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5252 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 02, 2017 14:32 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Galena |
| Locality: | | Gyudyurska Mine, Zlatograd, Smolyan Oblast, Bulgaria | |
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| Dimensions: | 4.3 x 6.5 cm |
| Description: |
| Upright-standing plates of bright spinel-twinned galena crystals. |
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5170 Time(s) |
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| Mineral: | Galena |
| Locality: | | Gyudyurska Mine, Zlatograd, Smolyan Oblast, Bulgaria | |
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| Dimensions: | 4.3 x 6.5 cm |
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5173 Time(s) |
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Nunzio
Joined: 28 Oct 2016
Posts: 58
Location: Massachusetts
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| Posted: Oct 03, 2017 06:11 Post subject: Re: Collection of Michael Shaw |
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| I like your Chalcedony! Great quality. I've seen so many of these but most are just meh quality. I think the smaller specimens are often underrated. It's the quality that counts.
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crosstimber
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Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 03, 2017 13:47 Post subject: Re: Collection of Michael Shaw |
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Thanks for your comment Nunzio. I agree that smaller specimens are sometimes overlooked. That is why I have no size restrictions for my collection.
| Mineral: | Malachite after azurite |
| Locality: | | Nchanga Mine, Chingola, Zambia | |
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| Dimensions: | 2.2 x 2.6 cm |
| Description: |
| Azurite crystals partially pseudomorphed to malachite from the Nchanga open pit in Zambia's copper belt. |
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5077 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 04, 2017 14:44 Post subject: Re: Collection of Michael Shaw |
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...
| Mineral: | Quartz with Dumortierite inclusions |
| Locality: | | Vaca Morta Quarry, Serra da Vereda, Boquira, Bahia, Brazil | |
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| Dimensions: | 1.0 x 2.2 cm |
| Description: |
| Radial sprays of acicular blue dumortierite include a clear quartz crystal. |
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4976 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 05, 2017 14:32 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Elbaite |
| Locality: | | Jonas Mine, Itatiaia, Conselheiro Pena, Vale do Rio Doce, Minas Gerais, Brazil | |
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| Dimensions: | 2.1 x 2.7 cm |
| Description: |
| A cranberry-red elbaite crystal surrounded by lepidolite crystals. |
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4911 Time(s) |
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Philippe Durand
Joined: 10 May 2016
Posts: 367
Location: Sainte Adresse
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| Posted: Oct 05, 2017 14:56 Post subject: Re: Collection of Michael Shaw |
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the last two ones are stunning.
two great marvelous jewels;
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 05, 2017 15:51 Post subject: Re: Collection of Michael Shaw |
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| Philippe Durand wrote: | the last two ones are stunning.
two great marvelous jewels; |
Thanks for your comment Philippe. Further proof that sometimes good things come in small packages :>)
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 07, 2017 12:00 Post subject: Re: Collection of Michael Shaw |
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Another galena!
| Mineral: | Galena |
| Locality: | | Julia Fisk Mine, Iowa Gulch, Leadville, Leadville District, Lake County, Colorado, USA | |
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| Dimensions: | 3.5 x 4.0 x 6.5 cm |
| Description: |
| Cuboctahedral galena with minor pyrite and sphalerite. |
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4787 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 10, 2017 16:50 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Celestine |
| Locality: | | Kalahari manganese field (KMF), Northern Cape Province, South Africa | |
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| Dimensions: | 5.5 x 6.7 x 7.7 cm |
| Description: |
| Divergent clusters of glassy, colorless celestine crystals with a bit of attached black matrix. |
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4679 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 2668
Location: Good Old Germany
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| Posted: Oct 11, 2017 11:03 Post subject: Re: Collection of Michael Shaw |
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Michael, I enjoyed your latest posts so much. As a "galenaphile" I like your galena from Colorado though I must confess that I never heard of the Julia Fisk Mine. And your Jonas Mine rubellite, wow, simply a perfect small specimen.
You have a wonderful collection, a good taste in minerals and an ability to make really good photos of them :-)
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 740
Location: Paris Area
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| Posted: Oct 11, 2017 11:15 Post subject: Re: Collection of Michael Shaw |
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| Tobi wrote: |
You have a wonderful collection, a good taste in minerals and an ability to make really good photos of them :-) |
I still feel it's an understatement...
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 11, 2017 16:35 Post subject: Re: Collection of Michael Shaw |
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| Fiebre Verde wrote: | | Tobi wrote: |
You have a wonderful collection, a good taste in minerals and an ability to make really good photos of them :-) |
I still feel it's an understatement... |
Thank you for those kind words Tobi and Gérard. Sharing my collection with other collectors on this forum has been a pleasure, and being able to view the collections of other FMF members has provided countless hours of enjoyment.
Regards,
Michael
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crosstimber
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Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 12, 2017 14:58 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Quartz (variety Amethyst) |
| Locality: | | Kakamunurle Quarry, Karur District, Tamil Nadu, India | |
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| Dimensions: | 3.0 x 3.2 cm |
| Description: |
| A small group of zoned amethyst crystals with no point of attachment. A couple of crystals are sceptered. |
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4453 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 14, 2017 10:21 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Calcite |
| Locality: | | Herja Mine, Chiuzbaia, Baia Mare, Maramures, Romania | |
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| Dimensions: | 4.0 x 6.0 cm |
| Description: |
| A divergent group of white calcite "fingers" associated with quartz and pyrite. |
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4292 Time(s) |
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Heimo Hellwig
Joined: 03 Aug 2014
Posts: 639
Location: Swakopmund
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| Posted: Oct 14, 2017 10:31 Post subject: Re: Collection of Michael Shaw |
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| Absolutely beautifull Calcite Michael.
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 14, 2017 11:34 Post subject: Re: Collection of Michael Shaw |
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| Heimo Hellwig wrote: | | Absolutely beautiful Calcite Michael. |
Thanks Heimo. Romanian minerals have been a focus of my collection for over 30 years and this is the only calcite that I have ever seen from Herja with this habit. Glad you like it.
Michael
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 16, 2017 08:41 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Babingtonite |
| Locality: | | Lane Quarry, Westfield, Hampden County, Massachusetts, USA | |
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| Dimensions: | 1.9 x 2.5 cm |
| Description: |
| Lustrous black babingtonite crystals with minor prehnite. |
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4110 Time(s) |
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crosstimber
Site Admin
Joined: 30 Apr 2008
Posts: 1270
Location: Oklahoma
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| Posted: Oct 18, 2017 11:49 Post subject: Re: Collection of Michael Shaw |
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| Mineral: | Beryl (variety aquamarine) |
| Locality: | | Nagar, Hunza Valley, Gilgit District, Gilgit-Baltistan (Northern Areas), Pakistan | |
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| Dimensions: | 2.5 x 3.5 cm |
| Description: |
| Parallel growth of two gemmy aquamarine crystals surrounded by muscovite crystals. |
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3985 Time(s) |
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