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Don Lum
Joined: 03 Sep 2012
Posts: 2919
Location: Arkansas
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 Posted: Jul 09, 2013 22:45 Post subject: Re: Collection of Michael Shaw |
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| Roger Warin wrote: | Amazing pics and specimens.
Roger. |
Michael,
I totally agree with Pierre and Roger.
Don
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 10, 2013 09:49 Post subject: Re: Collection of Michael Shaw |
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Thanks Don. I really look forward to viewing all of the collection threads each day. Each one is a reflection of the tastes and interests of the individual collector, and in the case of Pierre's and Mike Wood's threads, some wonderful photos of where these treasures come from.
| Description: |
Quartz
Anahi Mine, La Gaiba District, Sandoval Prov., Santa Cruz Dept., Bolivia
3.2 x 8.0 cm.
Partially etched crystal of amethyst with a gemmy interior and zones of yellow citrine. |
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39776 Time(s) |
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| Description: |
Sulphur
El Desierto Mine, San Pablo de Napa, Daniel Campos Prov., Potosi Dept., Bolivia
6.4 x 8.4 cm.
Gemmy, complex Sulphur crystals on a gray altered volcanic matrix. |
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39715 Time(s) |
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| Description: |
Magnetite
Cerro Huanaquino, Potosi Dept., Bolivia
4.5 x 6.9 cm.
Octahedral magnetite crystals to 1.5 cm. |
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39797 Time(s) |
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| Description: |
Pyrite
Canutillos Mine, Machacamarca District, Cornelio Saavedra Prov., Potosí Dept., Bolivia
3.7 x 5.2 cm.
Brassy pyrite crystals with an unusual habit. |
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39668 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 13, 2013 10:04 Post subject: Re: Collection of Michael Shaw |
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A few more from Bolivia.
| Description: |
Franckeite
Itos Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
6.4 x 7.0 cm.
A rich mass of crystalline franckeite, |
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39559 Time(s) |
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| Description: |
Franckeite
Itos Mine, Oruro City, Cercado Province, Oruro Department, Bolivia
6.4 x 7.0 cm |
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39566 Time(s) |
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| Description: |
Vauxite
Siglo Veinte Mine, Llallagua, Bustillo Prov., Potosi Dept., Bolivia
4.0 x 5.5 cm.
A crystallized crust of vauxite from the type locality for the species. |
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39539 Time(s) |
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| Description: |
Paravauxite
Siglo Veinte Mine, Llallagua, Bustillo Prov., Potosi Dept., Bolivia
6.1 x 9.4 cm.
Sharp pale green paravauxite blades to 1.0 cm from the type locality. Ex. Philadelphia Academy Collection. This specimen was collected by Samuel Gordon during one of the Vaux expeditions to Bolivia. |
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39557 Time(s) |
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| Description: |
Wavellite
Siglo Veinte Mine, Llallagua, Bustillo Prov., Potosi Dept., Bolivia
5.1 x 7.0 cm.
Numerous yellowish-white spheres of wavellite covering a thin plate and associated with transparent quartz crystals and micro cassiterite. |
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39529 Time(s) |
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| Description: |
Cylindrite
Santa Cruz Mine, Poopó town, Poopó Province, Oruro Department, Bolivia
6.2 x 7.1 cm.
Steel gray crystals of cylindrite showing the tubular habit that gives the species its name. The Santa Cruz Mine is the type locality for this mineral. |
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39547 Time(s) |
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| Description: |
Cylindrite
Santa Cruz Mine, Poopó town, Poopó Province, Oruro Department, Bolivia
6.2 x 7.1 cm. FOV~2.0 cm |
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39476 Time(s) |
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Roger Warin
Joined: 23 Jan 2013
Posts: 1239
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| Posted: Jul 13, 2013 10:44 Post subject: Re: Collection of Michael Shaw |
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Interesting. Long ago that I did not seen a cylindrite.
Roger.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 13, 2013 14:21 Post subject: Re: Collection of Michael Shaw |
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| Roger Warin wrote: | Interesting. Long ago that I did not seen a cylindrite.
Roger. |
Roger,
Although frankeite and cylindrite are both tin sulfosalts that are apparently pretty common in the district, they are rare throughout the rest of the world. Apparently, there are still quantities of both of these minerals in the mines at Oruro, but as of 2009 there hasn't been any production. According to the Lithographie monograph on Bolivia, the last cylindrite to hit the market was in 1995. I suppose the scarcity on the market is related to the fact that it's occurrence is very restricted, and being a black mineral, it is not that appealing to many collectors.
Michael
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Roger Warin
Joined: 23 Jan 2013
Posts: 1239
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| Posted: Jul 13, 2013 15:13 Post subject: Re: Collection of Michael Shaw |
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Many thanks, Michael.
Roger.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 15, 2013 09:08 Post subject: Re: Collection of Michael Shaw |
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A few specimens in my collection from Argentina.
| 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. |
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42728 Time(s) |
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| 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. |
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42700 Time(s) |
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| 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. |
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42763 Time(s) |
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| 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. |
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42728 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 17, 2013 08:43 Post subject: Re: Collection of Michael Shaw |
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Argentina minerals.
| 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. |
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42667 Time(s) |
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| 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. |
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42595 Time(s) |
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| 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. |
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42601 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 21, 2013 18:40 Post subject: Re: Collection of Michael Shaw |
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Today I will finish up South America with a few specimens from Chile.
| 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. |
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42562 Time(s) |
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| 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. |
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| Viewed: |
42559 Time(s) |
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| 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. |
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42558 Time(s) |
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| 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. |
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42540 Time(s) |
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vic rzonca
Joined: 18 Nov 2008
Posts: 820
Location: MA
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| Posted: Jul 21, 2013 21:14 Post subject: Re: Collection of Michael Shaw |
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| Great shots, Mike. Made me look back at your gallery. Nice!
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 22, 2013 08:41 Post subject: Re: Collection of Michael Shaw |
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| 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
Joined: 23 Jan 2013
Posts: 1239
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| Posted: Jul 22, 2013 09:52 Post subject: Re: Collection of Michael Shaw |
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Hello,
Great photos and remarkable specimens.
Never seen atacamite # TN 415.
Roger.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 22, 2013 10:10 Post subject: Re: Collection of Michael Shaw |
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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.
| 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. |
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| Viewed: |
42519 Time(s) |
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| 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. |
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| Viewed: |
42511 Time(s) |
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| Description: |
Calcite
Jalgaon, Maharashtra State, India
4.9 x 5.9 cm
Interpenetrant, colorless, distorted rhombs on a small shard of chalcedony. |
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| Viewed: |
42456 Time(s) |
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| 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. |
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| Viewed: |
42539 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 22, 2013 10:18 Post subject: Re: Collection of Michael Shaw |
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| 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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma
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| Posted: Jul 24, 2013 10:00 Post subject: Re: Collection of Michael Shaw |
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Continuing today with minerals from the Deccan traps.
| 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. |
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| Viewed: |
42380 Time(s) |
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| 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. |
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42322 Time(s) |
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| Description: |
Powellite
Savada, Jalgaon Dist., Maharashtra, India
5.0 x 7.0 cm.
A yellowish, pseudo-octahedral powellite crystal on white scolecite. |
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| Viewed: |
42314 Time(s) |
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| 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. |
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| Viewed: |
42371 Time(s) |
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| Description: |
Heulandite
Aurangabad District, Maharashtra, India
3.0 x 5.2 cm.
Floater group of heulandite crystals colored pale green by inclusions of celadonite. |
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| Viewed: |
42401 Time(s) |
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