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Collection of Michael Shaw
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Roger Warin




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PostPosted: Jul 13, 2013 15:13    Post subject: Re: Collection of Michael Shaw  

Many thanks, Michael.
Roger.
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Michael Shaw
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PostPosted: Jul 15, 2013 09:08    Post subject: Re: Collection of Michael Shaw  

A few specimens in my collection from Argentina.


0771 Rhodochrosite.jpg
 Description:
Rhodochrosite
Capillitas Mine, Andalgalá Department, Catamarca, Argentina
0.6 x 8.0 cm
Polished section through a rhodochrosite stalactite with concentric bands surrounding a bright pink center core.
 Viewed:  27123 Time(s)

0771 Rhodochrosite.jpg



1155 Hematite.jpg
 Description:
Hematite
Payún volcano, Altiplano de Payún Matru, Malargüe Department, Mendoza, Argentina
2.6 x 5.8 cm.
Elongated octahedral hematite pseudomorphing magnetite and showing skeletal herringbone ribs. Collected from a fumarole in 2001.
 Viewed:  27117 Time(s)

1155 Hematite.jpg



1345 Quartz var. condor agate.jpg
 Description:
Chalcedony var. agate
Chubut Province, Argentina
6.5 x 7.2 cm.
Colorful, polished section of "condor" agate with strong fortification bands on the outer edge and colorless crystalline quartz in the center.
 Viewed:  27131 Time(s)

1345 Quartz var. condor agate.jpg



1272 Fluorite.jpg
 Description:
Fluorite
El Gaudro Mine, Talampaya, La Rioja, Argentina
6.2 x 7.1 cm.
Multiple, intergrown, pale green fluorite octahedrons with frosted faces on a quartz matrix.
 Viewed:  27134 Time(s)

1272 Fluorite.jpg


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Michael Shaw
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PostPosted: Jul 17, 2013 08:43    Post subject: Re: Collection of Michael Shaw  

Argentina minerals.


1759 Natrolite.jpg
 Description:
Natrolite
San Agustin Del Valle Fertil, San Juan Prov., Argentina
4.6 x 7.6 x 10.2 cm.
Colorless acicular crystals of natrolite to 3.5 cm with reddish-brown iron oxide inclusions. Collected in Summer 2004.
 Viewed:  27074 Time(s)

1759 Natrolite.jpg



1857 Inyoite (2).jpg
 Description:
Inyoite
Monte Azul deposit, Sijes, Salta Prov., Argentina
4.1 x 5.3 cm.
Sharply-formed colorless pseudorhombic crystals to 2.2 cm on edge with minor meyerhofferite.
 Viewed:  27038 Time(s)

1857 Inyoite (2).jpg



1935 Microcline.jpg
 Description:
Microcline
Papachacra Mts., Belen Dept., Catamarca Prov., Argentina
3.0 x 3.3 cm.
A single cream-colored twinned microcline crystal sitting atop smaller microcline crystals.
 Viewed:  27035 Time(s)

1935 Microcline.jpg


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PostPosted: Jul 21, 2013 18:40    Post subject: Re: Collection of Michael Shaw  

Today I will finish up South America with a few specimens from Chile.


0323 Brochantite.jpg
 Description:
Brochantite
Vieja Mine, Potrerillos, Diego de Almagro, Chañaral Province, Atacama Region, Chile
5.7 x 7.0 cm.
Dark green acicular brochantite and pale blue cyanotrichite covering the top surface of brown gossan matrix.
 Viewed:  26977 Time(s)

0323 Brochantite.jpg



0477 Atacamite.jpg
 Description:
Atacamite
La Farola Mine, Cerro Pintado, Tierra Amarilla,, Copiapo Prov., Chile
5.0 x 7.0 cm.
Lustrous dark green needles of atacamite covering both sides of a flat piece of matrix.
 Viewed:  26984 Time(s)

0477 Atacamite.jpg



TN415 Atacamite.jpg
 Description:
Atacamite
La Farola Mine, Cerro Pintado, Tierra Amarilla,, Copiapo Prov., Chile
1.5 x 2.5 cm.
A floater fan-shaped spray of atacamite.
 Viewed:  27011 Time(s)

TN415 Atacamite.jpg



0820 Atacamite closeup.jpg
 Description:
Atacamite
La Farola Mine, Cerro Pinatdo, Tierra Amarilla,, Copiapo Prov., Chile
8.0 x 12.5 cm, FOV~3.5 cm
Flat-laying radial sprays of lustrous, dark green atacamite on a thin layer of off-white halloysite with isolated spherical sprays of light olive green libethenite and blue-green pseudomalachite.
 Viewed:  26962 Time(s)

0820 Atacamite closeup.jpg


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vic rzonca




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PostPosted: Jul 21, 2013 21:14    Post subject: Re: Collection of Michael Shaw  

Great shots, Mike. Made me look back at your gallery. Nice!
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Michael Shaw
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PostPosted: Jul 22, 2013 08:41    Post subject: Re: Collection of Michael Shaw  

vic rzonca wrote:
Great shots, Mike. Made me look back at your gallery. Nice!


Thanks Vic. It has been many years ago, but I grew up in the Bay State, and as a young collector, went on field trips all over MA, VT, NH, ME, CT, and NY. As a result, I have been following your collection thread with great interest. I'm sure quite a few of the localities where we collected are probably closed now.
Michael
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Roger Warin




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PostPosted: Jul 22, 2013 09:52    Post subject: Re: Collection of Michael Shaw  

Hello,
Great photos and remarkable specimens.
Never seen atacamite # TN 415.
Roger.
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PostPosted: Jul 22, 2013 10:10    Post subject: Re: Collection of Michael Shaw  

As a young mineral collector, my approach to collecting was not very focused. The first "group" of minerals that I remember taking an interest in was zeolites. Although there were several trap rock quarries within a one hour drive of where we lived, they were closed to collecting. However, if you walked along the railroad tracks and searched through the ballast, you could usually find a few decent datolite, calcite, and prehnite specimens. This was my first introduction to the zeolite group and its common associates.

All of this was before U.S. collectors were exposed to the overwhelming variety and abundance of Indian zeolites. My first introduction to zeolites from India was at a small mineral show, and I remember thinking that the variety and crystallization were fantastic. I came home with a nice peach-colored stilbite from Jalgaon and an okenite from Mumbai. The vast amount of this specimen material available during the past 25 years has made it easy to become jaded. However, nearly 35 years later, I have to admit that I am still fascinated by zeolites from the Deccan basalts. So, in the next few posts I have decided to show some of the Deccan zeolites in my collection.



1122 Stilbite (2).jpg
 Description:
Stilbite
Jalgaon, Maharashtra State, India
7.7 x 10.5 cm.
An intergrown group of peach-colored stilbite crystals on a flat basalt plate covered with gray drusy quartz.
 Viewed:  26884 Time(s)

1122 Stilbite (2).jpg



0449 Gyrolite.jpg
 Description:
Gyrolite
Malad, Ward 38, Mumbai District, Maharashtra, India
7.6 x 8.3 cm.
An olive-green hemisphere of gyrolite on a thin matrix of smaller gyrolite spheres associated with blocky colorless fluorapophyllite crystals.
 Viewed:  26887 Time(s)

0449 Gyrolite.jpg



1066 Calcite.jpg
 Description:
Calcite
Jalgaon, Maharashtra State, India
4.9 x 5.9 cm
Interpenetrant, colorless, distorted rhombs on a small shard of chalcedony.
 Viewed:  26893 Time(s)

1066 Calcite.jpg



1886 Natrolite.jpg
 Description:
Natrolite
Yeola, Nasik District, Maharashtra, India
7.3 x 9.8 cm.
Divergent sprays of transparent prismatic natrolite associated with small pseudocubic crystals of apophyllite-(KF) on brown basalt. Recovered from a well dig in Sept. 2011.
 Viewed:  26941 Time(s)

1886 Natrolite.jpg


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PostPosted: Jul 22, 2013 10:18    Post subject: Re: Collection of Michael Shaw  

Roger Warin wrote:
Hello,
Great photos and remarkable specimens.
Never seen atacamite # TN 415.
Roger.


Thank you Roger. According to Rock Currier, these are sometimes found free in crevices between breccia blocks. I had only seen a few photos of these on Mindat. In any case I was happy to have found this one at Tucson.
Michael
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PostPosted: Jul 24, 2013 10:00    Post subject: Re: Collection of Michael Shaw  

Continuing today with minerals from the Deccan traps.


0146 Mesolite.jpg
 Description:
Mesolite
Lonavala, Pune District, Maharashtra, India
4.5 x 11.7 cm.
Divergent sprays of colorless mesolite on a thin rind of basalt and pale pink stilbite.
 Viewed:  26784 Time(s)

0146 Mesolite.jpg



1486 Gooscreekite.jpg
 Description:
Goosecreekite
Pandulena Quarry, Nasik Dist., Maharashtra, India
5.0 x 5.8 cm.
A colorless spherical aggregate of goosecreekite sitting on pale tan stilbite with pearly white heulandite.
 Viewed:  26747 Time(s)

1486 Gooscreekite.jpg



1267 Powellite.jpg
 Description:
Powellite
Savada, Jalgaon Dist., Maharashtra, India
5.0 x 7.0 cm.
A yellowish, pseudo-octahedral powellite crystal on white scolecite.
 Viewed:  26740 Time(s)

1267 Powellite.jpg



0144 Stellerite.jpg
 Description:
Stellerite
Nasik District, Maharashtra, India
3.5 x 5.7 cm.
Two intergrown hemispheres of pearly-lustered stellerite on a small shard of dark gray basalt.
 Viewed:  26783 Time(s)

0144 Stellerite.jpg



1641 Heulandite.jpg
 Description:
Heulandite
Aurangabad District, Maharashtra, India
3.0 x 5.2 cm.
Floater group of heulandite crystals colored pale green by inclusions of celadonite.
 Viewed:  26761 Time(s)

1641 Heulandite.jpg


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Roger Warin




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PostPosted: Jul 24, 2013 10:11    Post subject: Re: Collection of Michael Shaw  

Hello,
I enjoyed Stellerite, in delicate shades. As well as heulandite.
Roger.
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Michael Shaw
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PostPosted: Jul 24, 2013 14:17    Post subject: Re: Collection of Michael Shaw  

Roger Warin wrote:
Hello,
I enjoyed Stellerite, in delicate shades. As well as heulandite.
Roger.


Thanks Roger. So many of the zeolites are white or colorless, it's nice when there are inclusions that impart a little color.
Michael
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PostPosted: Jul 26, 2013 09:42    Post subject: Re: Collection of Michael Shaw  

More Indian zeolites.


1121 Fluorapophyllite.jpg
 Description:
Apophyllite-(KF)
Kandivali Quarry, Malad, Ward 38, Mumbai District, Maharashtra, India
7.5 x 9.5 cm.
Colorless elongated pseudocubic crystals of apophyllite on pale green prehnite associated with snow white spheres of acicular okenite.
 Viewed:  26577 Time(s)

1121 Fluorapophyllite.jpg



0546 Fluorapophyllite.jpg
 Description:
Apophyllite-(KF)
Jalgaon District, Maharashtra, India
4.5 x 7.1 cm.
A chalcedony stalactite covered with colorless apophyllite crystals and a pinkish stilbite crystal speckled with dark green jugoldite.
 Viewed:  26635 Time(s)

0546 Fluorapophyllite.jpg



0535 Scolecite.jpg
 Description:
Scolecite
Junnar, Pune District, Maharashtra, India
4.5 x 9.4 cm.
Three intersecting sprays of slender colorless scolecite crystals.
 Viewed:  26630 Time(s)

0535 Scolecite.jpg



0444 Heulandite.jpg
 Description:
Heulandite
Aurangabad District, Maharashtra, India
5.7 x 8.3 cm.
A group of heulandite crystals grading from colorless to pale peach on chalky-white mordenite.
 Viewed:  26571 Time(s)

0444 Heulandite.jpg


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PostPosted: Jul 26, 2013 10:12    Post subject: Re: Collection of Michael Shaw  

Hello Michael,
As ever, perfect.
I forgot morphological distinctions (on termination) that allow differentiation of natrolite, mesolite and scolecite.
Thank you for sharing.
Roger.
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PostPosted: Jul 26, 2013 14:28    Post subject: Re: Collection of Michael Shaw  

Roger Warin wrote:
Hello Michael,
As ever, perfect.
I forgot morphological distinctions (on termination) that allow differentiation of natrolite, mesolite and scolecite.
Thank you for sharing.
Roger.


Hi Roger,
I am not aware of any absolute way to visually distinguish between natrolite, mesolite, and scolecite. Generally speaking, mesolite forms the thinnest crystals, natrolite somewhat larger, and scolecite forms more robust crystals, but this isn't a reliable identifying characteristic. Of course natrolite and mesolite are orthorhombic, while scolecite is monoclinic. The problem is, twinning makes scolecite appear to be orthorhombic. To my knowledge, the terminations of all three minerals are typically low angle pyramids. If anyone knows a reliable way to tell these apart visually, feel free to chime in.
Michael
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PostPosted: Jul 28, 2013 14:13    Post subject: Re: Collection of Michael Shaw  

Continuing with minerals from the Deccan traps.


1383 Fluorapophyllite.JPG
 Description:
Apophyllite-(KF)
Aurangabad District, Maharashtra, India
8.5 x 15.0 cm.
Colorless crystals of apophyllite with white stilbite crystals, scattered over a thin crust of small reddish-pink heulandite crystals.
 Viewed:  26469 Time(s)

1383 Fluorapophyllite.JPG



1335 Calcite.jpg
 Description:
Calcite
Vambori, Aurangabad District, Maharashtra, India
4.5 x 5.0 cm.
Pale green scalenohedral calcite crystal composed of multiple stacked rhombs, with small calcite rhombs around the base. Recovered during a well dig in 2005.
 Viewed:  26495 Time(s)

1335 Calcite.jpg



1397 Thomsonite.jpg
 Description:
Thomsonite
Soygaon, Aurangabad District, Maharashtra, India
4.5 x 7.6 cm.
A group of creamy white thomsonite spheres with reddish-brown iron oxide tinges.
 Viewed:  26487 Time(s)

1397 Thomsonite.jpg



1334 Stilbite.jpg
 Description:
Stilbite
Aurangabad District, Maharashtra, India
3.2 x 8.0 cm.
A group of colorless stilbite crystals attached to a thin stalactite of salmon-colored heulandite crystals
 Viewed:  26464 Time(s)

1334 Stilbite.jpg


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PostPosted: Jul 29, 2013 15:28    Post subject: Re: Collection of Michael Shaw  

Continuing with specimens from India's Deccan traps - a quintet of stilbite.


1377 Stilbite.jpg
 Description:
Stilbite
Nasik District, Maharashtra, India
4.5 x 6.5 cm.
Cluster of bright orange stilbite which displays the typical wheat-sheave arrangement.
 Viewed:  26411 Time(s)

1377 Stilbite.jpg



1113 Stilbite.jpg
 Description:
Stilbite
Sakur, Ahmednagar District, Maharashtra, India
8.0 x 11.0 cm
A group of lustrous, white crystals to 5.5 cm partially colored reddish-brown by iron oxide.
 Viewed:  26399 Time(s)

1113 Stilbite.jpg



1093 Stilbite.jpg
 Description:
Stilbite
Jalgaon District, Maharashtra, India
5.7 x 6.0 cm
A large bowtie stilbite with a few smaller accessory stilbite crystals.
 Viewed:  26400 Time(s)

1093 Stilbite.jpg



2071 Stilbite.jpg
 Description:
Stilbite
Jalgaon District, Maharashtra, India
7.0 x 7.7 cm.
Pale salmon-colored stilbite crystals on stalactitic drusy blue-gray chalcedony. Collected in 2005.
 Viewed:  26409 Time(s)

2071 Stilbite.jpg



1266 Heulandite.jpg
 Description:
Stilbite
Sakur, Ahmednagar District, Maharashtra, India
4.0 x 8.1 cm.
A group of stilbite crystals included with green celadonite.
 Viewed:  26449 Time(s)

1266 Heulandite.jpg


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PostPosted: Jul 29, 2013 15:45    Post subject: Re: Collection of Michael Shaw  

As always, really nice photos (and specimens). Are you shooting on glass?
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PostPosted: Jul 29, 2013 16:28    Post subject: Re: Collection of Michael Shaw  

what else to say, wow
Roger.
PS: same questions.
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PostPosted: Jul 29, 2013 17:50    Post subject: Re: Collection of Michael Shaw  

GneissWare wrote:
As always, really nice photos (and specimens). Are you shooting on glass?


Thank you Bob and Roger. Yes, the specimens rest on a a piece of glass and the backgrounds, consisting of various colored mat boards, are placed at a 45 degree angle below the glass. A single light illuminates the background and creates the gradient effect, I use 3 lights above to illuminate the specimen, and often a reflector or two to highlight crystal faces, etc. I use halogen lights with the camera white balance set to the color temperature of the bulbs. It's not a real complex setup but yields adequate results for my needs.
Michael
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