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Roger Warin
Joined: 23 Jan 2013
Posts: 1240
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 Posted: Jul 24, 2013 10:11 Post subject: Re: Collection of Michael Shaw |
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Hello,
I enjoyed Stellerite, in delicate shades. As well as heulandite.
Roger.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 24, 2013 14:17 Post subject: Re: Collection of Michael Shaw |
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| 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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 26, 2013 09:42 Post subject: Re: Collection of Michael Shaw |
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More Indian zeolites.
| 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. |
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42149 Time(s) |
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| 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. |
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42219 Time(s) |
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Scolecite
Junnar, Pune District, Maharashtra, India
4.5 x 9.4 cm.
Three intersecting sprays of slender colorless scolecite crystals. |
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42134 Time(s) |
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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. |
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42063 Time(s) |
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Roger Warin
Joined: 23 Jan 2013
Posts: 1240
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| Posted: Jul 26, 2013 10:12 Post subject: Re: Collection of Michael Shaw |
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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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 26, 2013 14:28 Post subject: Re: Collection of Michael Shaw |
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| 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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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 28, 2013 14:13 Post subject: Re: Collection of Michael Shaw |
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Continuing with minerals from the Deccan traps.
| 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. |
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41758 Time(s) |
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| 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. |
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41780 Time(s) |
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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. |
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41842 Time(s) |
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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 |
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41789 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 29, 2013 15:28 Post subject: Re: Collection of Michael Shaw |
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Continuing with specimens from India's Deccan traps - a quintet of stilbite.
| Description: |
Stilbite
Nasik District, Maharashtra, India
4.5 x 6.5 cm.
Cluster of bright orange stilbite which displays the typical wheat-sheave arrangement. |
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41690 Time(s) |
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| 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. |
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41713 Time(s) |
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| Description: |
Stilbite
Jalgaon District, Maharashtra, India
5.7 x 6.0 cm
A large bowtie stilbite with a few smaller accessory stilbite crystals. |
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41749 Time(s) |
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| 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. |
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41769 Time(s) |
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| Description: |
Stilbite
Sakur, Ahmednagar District, Maharashtra, India
4.0 x 8.1 cm.
A group of stilbite crystals included with green celadonite. |
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41770 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Jul 29, 2013 15:45 Post subject: Re: Collection of Michael Shaw |
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| As always, really nice photos (and specimens). Are you shooting on glass?
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Roger Warin
Joined: 23 Jan 2013
Posts: 1240
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| Posted: Jul 29, 2013 16:28 Post subject: Re: Collection of Michael Shaw |
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what else to say, wow
Roger.
PS: same questions.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 29, 2013 17:50 Post subject: Re: Collection of Michael Shaw |
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| 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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Don Lum
Joined: 03 Sep 2012
Posts: 2919
Location: Arkansas
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| Posted: Jul 29, 2013 18:17 Post subject: Re: Collection of Michael Shaw |
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Michael,
I am enjoying your collection.
Thanks for the photography tips.
Don
_________________
hogwild |
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Greg Lilly
Joined: 05 May 2013
Posts: 78
Location: Tauranga
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| Posted: Jul 29, 2013 21:51 Post subject: Re: Collection of Michael Shaw |
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Hi Michael,
great photos, I love the calcite #1335, I remember these coming onto the market but I didn't manage to get one,
Thanks for sharing.
Greg
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 30, 2013 08:03 Post subject: Re: Collection of Michael Shaw |
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Thanks Don. I am enjoying looking through your collection as well.
Thanks Greg. These pale green calcites were part of a relatively small find, and they weren't widely distributed amongst the Indian dealers. They were only available for a short time, so I'm glad I was able to pick this one up when I did.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Jul 31, 2013 09:26 Post subject: Re: Collection of Michael Shaw |
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Continuing with minerals from India's Deccan traps.
| Description: |
Scolecite
Vambori, Ahmednagar District, Maharashtra, India
5.5 x 7.0 cm.
Spherical growth of bright white scolecite with minor apophyllite-(KF). |
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| Viewed: |
45718 Time(s) |
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| Description: |
Pentagonite
Quarry #4, Wagholi, Pune District, Maharashtra, India
6.0 x 6.2 cm., FOV~4.0 cm.
Two groups of pentagonite resting on a crust of blue chalcedony and white mordenite on brown basalt. |
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45724 Time(s) |
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| Description: |
Apophyllite-(KF)
Kolhar, Ahmednagar District, Maharastra, India
9.0 x 11.0 cm.
Colorless to pale pink crystals of apophyllite-(KF) and stilbite covering a coral-like growth of pink chalcedony. Collected in 2005. |
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| Viewed: |
45726 Time(s) |
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| Description: |
Apophyllite-(KF)
Nasik, Masik District, Maharashtra, India
7.6 x 9.0 cm.
Doubly-terminated, glassy prism of apophyllite-(KF) with a greenish central zone and colorless terminations associated with pale peach stilbite crystals and smaller colorless apophyllite crystals. |
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45721 Time(s) |
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| Description: |
Calcite
Mirzapur, Gangapur District, Maharashtra, India
8.1 x 10.9 cm.
Sharp calcite scalenohedrons to 2.5 cm with bladed, white stilbite crystals on drusy pink heulandite. Collected in 2006. |
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| Viewed: |
45738 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2252
Location: Oklahoma
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| Posted: Aug 02, 2013 09:50 Post subject: Re: Collection of Michael Shaw |
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Continuing with minerals from India's Deccan traps.
| Description: |
Calcite
Panvel, Raigad District, Maharashtra, India
7.1 x 11.0 cm.
Colorless groups of scalenohedral calcite to 3.5 cm on pale peach stilbite and quartz. |
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| Viewed: |
45646 Time(s) |
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| Description: |
Stilbite-(Ca)
Chalsigaon, Jalgaon District, Maharashtra, India
6.6 x 6.8 cm.
Bladed, colorless stilbite crystals to 4.0 cm on a stalactite of small peach-colored heulandite crystals. |
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| Viewed: |
45642 Time(s) |
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| Description: |
Fluorapophyllite-(K)
Ahmednagar District, Maharashtra, India
5.0 x 9.5 cm.
An intersecting group of apophyllite crystals to 5.2 cm with pale tan stilbite crystals. |
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45655 Time(s) |
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| Description: |
Quartz ps. calcite
Jalgaon District, Maharashtra, India
7.5 x 9.9 cm.
Colorless quartz epimorphing calcite associated with stalactitic chalcedony and peach-colored stilbite crystals. |
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45661 Time(s) |
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| Description: |
Quartz
Jamner, Jalgaon District, Maharashtra, India
10.1 x 14.0 cm.
Slender fingers of milky white chalcedony with minor stilbite. |
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45652 Time(s) |
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