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Favourite Quartzes?
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Tobi




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PostPosted: Dec 05, 2018 04:18    Post subject: Re: Favourite Quartzes?  

I guess that quartzes from the Alps are favourites for many quartz collectors. I really love alpine quartzes, so this one is definitely one of my personal all-time favourites:


ZinggQ.JPG
 Mineral: Smoky Quartz
 Locality:
Zinggenstöcke, Oberaar Lake area, Grimsel area, Hasli Valley, Bern, Switzerland
 Dimensions: Height 20 cm
 Description:
 Viewed:  5277 Time(s)

ZinggQ.JPG



ZinggQ-back.JPG
 Mineral: Smoky Quartz
 Locality:
Zinggenstöcke, Oberaar Lake area, Grimsel area, Hasli Valley, Bern, Switzerland
 Dimensions: Height 20 cm
 Description:
 Viewed:  5299 Time(s)

ZinggQ-back.JPG


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Jacqui Parsons




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PostPosted: Dec 05, 2018 17:02    Post subject: Re: Favourite Quartzes?  

vic rzonca wrote:
This is from the book by Harold L. Dibble, Quartz." Cathedral Quartz. One of the most common of these types is known as Cathedral quartz. These are crystals with the axes of the secondary crystals parallel to those of the main crystal. These clusters vaguely resemble smaller spires or buttresses around the main spire of a cathedral." More of a descriptive term than a scientific one. I guess everything has to be called something.

Do you know what causes that?
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B.




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PostPosted: Dec 15, 2018 13:29    Post subject: Re: Favourite Quartzes?  

Blue quartz can be caused by any of a number of inclusions, both microscopic and macroscopic. The blue quartz might come from a wide variety of environments and worldwide localities.

These 2 examples, from an under appreciated situation, were self collected from Indiana, are of microcrystalline quartz, BLUE CHALCEDONY, and apparently derive their color from water existing in the micro spaces between the micro crystalline quartz. If kept dry, they seem to gradually pale out to very pale blue-gray over a period of years. Keeping fresh blue examples under water seems to help preserve the blue color. BOB



fullsizeoutput_2ba9.jpeg
 Mineral: Quartz (variety chalcedony)
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: 11 cm x 8 cm
 Description:
Microcrystalline quartz, chalcedony, with limestone matrix
 Viewed:  5148 Time(s)

fullsizeoutput_2ba9.jpeg



fullsizeoutput_2b90.jpeg
 Mineral: Clear crystalline Quartz with microcrystalline Quartz (variety chalcedony)
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Larger half is 16 cm x 11 cm
 Description:
Photographed as part of my 2017 Cincinnati show display case. Self-collected about 6 weeks prior to the show. Kept under water since my collecting the example and the show.
 Viewed:  5153 Time(s)

fullsizeoutput_2b90.jpeg


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B.




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PostPosted: May 09, 2019 05:44    Post subject: Re: Favourite Quartzes?  

From a relatively new find, these hematite included quartz specimens are marketed by the name "red amethyst or pink amethyst". They are from a gypsum mining district in Patagonia, Argentina and first appeared on the mineral market about 2016 - 2017. The quartz varies in color from pink thru bright red to a mauve shade.

I have 3 examples, acquired at the 2018 Denver Show. My 2 larger examples have calcites atop the quartz. The photo is a close up of the examples from my display case at last week's Cincinnati mineral show.



fullsizeoutput_2ce6.jpeg
 Mineral: Hematite included quartz and calcite
 Locality:
"Choique" area, Pehuenches Department, Del Neuquén Province, Argentina
 Dimensions: Each specimen is about 11 cm max dimension
 Description:
Acquired at the 2018 Denver show, Displayed at the 2019 Cincinnati show.
 Viewed:  4821 Time(s)

fullsizeoutput_2ce6.jpeg


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Tobi




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PostPosted: May 11, 2019 05:32    Post subject: Re: Favourite Quartzes?  

Bob Harman wrote:
From a relatively new find, these hematite included quartz specimens are marketed by the name "red amethyst or pink amethyst". They are from a gypsum mining district in Patagonia, Argentina and first appeared on the mineral market about 2016 - 2017. The quartz varies in color from pink thru bright red to a mauve shade.
Wow, they look great, wonderful colour!
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Tobi




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PostPosted: May 25, 2019 14:10    Post subject: Re: Favourite Quartzes?  

Though it produces masses of specimens and the stuff became quite common, Itremo/Madagascar became one of my favourite localities for quartz:


ITR-quaXL.JPG
 Mineral: Quartz
 Locality:
Itremo Massif, Itremo, Ambatofinandrahana District, Amoron'i Mania Region, Fianarantsoa Province, Madagascar
 Dimensions: Specimen size 20 cm
 Description:
 Viewed:  4601 Time(s)

ITR-quaXL.JPG



Madag_QUA.JPG
 Mineral: Quartz
 Locality:
Itremo Massif, Itremo, Ambatofinandrahana District, Amoron'i Mania Region, Fianarantsoa Province, Madagascar
 Dimensions: Specimen size 17 cm
 Description:
 Viewed:  4589 Time(s)

Madag_QUA.JPG



ITREcQUA.JPG
 Mineral: Quartz
 Locality:
Itremo Massif, Itremo, Ambatofinandrahana District, Amoron'i Mania Region, Fianarantsoa Province, Madagascar
 Dimensions: Specimen size 9,5 cm
 Description:
 Viewed:  4582 Time(s)

ITREcQUA.JPG


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Tobi




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PostPosted: Sep 16, 2020 05:53    Post subject: Re: Favourite Quartzes?  

We should talk more about quartz ;-)

There are two other favourite quartz localities that should be mentioned here, I think many collectors like them because of their incredible inclusions:

- Messina Mine, Musina, Vhembe District, Limpopo, South Africa
- Cabiche, Quípama Municipality, Boyacá Department, Colombia

I can't contribute specimens from these localities because sadly I don't own one, but I think others here do and could share photos of that wonderful quartzes :-)

Regards & stay safe
Tobi
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B.




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PostPosted: Jun 16, 2021 08:26    Post subject: Re: Favourite Quartzes?  

I decided to revive this long dormant quartz thread.

Interesting combinations of druzy quartz, variety amethyst and hematite included amethyst are rather commonly found together in examples from the High Atlas Mountains of Morocco.
This one of several examples in my collection, shows the gradation from one color to the other.
Several small calcites of no consequence are also seen.



fullsizeoutput_382b.jpeg
 Mineral: Quartz (variety amethyst) with Hematite inclusions and Calcite
 Locality:
Sidi Rahal, El Kelaâ des Sraghna Province, Marrakech-Tensift-El Haouz Region, Morocco
 Dimensions: 10 cm x 5 cm
 Description:
Quartz, var amethyst and hematite included amethyst
 Viewed:  1046 Time(s)

fullsizeoutput_382b.jpeg


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Eck Noch




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PostPosted: Jun 16, 2021 09:18    Post subject: Re: Favourite Quartzes?  

Here is a favorite of mine, an exceptional Smoky Quartz sitting atop some Albites. From an unlisted locality that we affectionately call The BBC Mine named such because of the large Smokies that we find.


0BE57850-9C9F-460A-AC16-3FFCFACF8229.jpeg
 Mineral: Quartz, Albite, Muscovite
 Locality:
El Dorado County, California, USA
 Dimensions: 7.5x6cm
 Description:
 Viewed:  1020 Time(s)

0BE57850-9C9F-460A-AC16-3FFCFACF8229.jpeg


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Eck Noch




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PostPosted: Jun 16, 2021 09:46    Post subject: Re: Favourite Quartzes?  

Here is another self collected piece out of our Eclipse mine, found in 2017 and pulled from the pocket that later became the namesake for the claim. The material from this pocket had exceptional inclusions but the quartz generally lacked clarity and luster, likely due to its rapid formation and tortured history. The material was picked up by Nathan Renfro of GIA and was published in the Micro World section of the Fall 2017 issue. This phantomed piece has numerous individual Anatase crystals as well as Anatase covered with epitaxial Rutile growth.


29BFC4B1-2CAD-41DB-A31E-CD42618ADC38.jpeg
 Mineral: Anatase, Quartz, Rutile
 Locality:
El Dorado County, California, USA
 Dimensions: 12.5cm
 Description:
 Viewed:  1007 Time(s)

29BFC4B1-2CAD-41DB-A31E-CD42618ADC38.jpeg


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Tobi




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PostPosted: Jun 17, 2021 02:37    Post subject: Re: Favourite Quartzes?  

Two wonderful quartz specimens! I really like the large one with the inclusions, but the "alpine style" smoky is also exceptional. Great pieces!

Regards
Tobi
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Eck Noch




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PostPosted: Jun 17, 2021 09:27    Post subject: Re: Favourite Quartzes?  

Tobi, thank you for your kind comment. Much appreciated! Here is a large, dark, but transparent Smoky Tessin from our pegmatite mine in Northern California. This came from a large pocket we dubbed the BBC Pocket for is exceptional and large smokies with brilliant green muscovite and rare hoppers albite formations.


5D936F0F-9ABC-42A8-991E-7909343F27F6.jpeg
 Mineral: Smoky Quartz, Albite, Muscovite
 Locality:
El Dorado County, California, USA
 Dimensions: 33cm
 Description:
 Viewed:  859 Time(s)

5D936F0F-9ABC-42A8-991E-7909343F27F6.jpeg


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Eck Noch




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PostPosted: Jun 17, 2021 09:59    Post subject: Re: Favourite Quartzes?  

Here is a lattice formation of light Smoky Quartz as a lattice formation. This epitaxial growth formation is due to the fact that the quartz grew from a cyclic baveno twin. The baveno twin was also coated with epitaxial Albite.


880E911E-0E6A-4773-80E1-79D902D0D004.jpeg
 Mineral: Quartz, Albite
 Locality:
El Dorado County, California, USA
 Dimensions: 4cm
 Description:
 Viewed:  846 Time(s)

880E911E-0E6A-4773-80E1-79D902D0D004.jpeg


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Eck Noch




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PostPosted: Jun 17, 2021 10:04    Post subject: Re: Favourite Quartzes?  

Here I present another from our Eclipse mine, this came from the Epiphany Pocket found in late 2016. This pocket yielded many very fine specimens of rich green Chlorite included Quartz, but to one side, were many crystals with white inclusions that I suspect are Calcite or clay minerals like cookieite. The orange and yellow colors are possibly due to limonite staining.


E338898E-5215-49DE-B7C7-71B494521D77.jpeg
 Mineral: Quartz
 Locality:
El Dorado County, California, USA
 Description:
 Viewed:  834 Time(s)

E338898E-5215-49DE-B7C7-71B494521D77.jpeg


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Eck Noch




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PostPosted: Jun 17, 2021 10:18    Post subject: Re: Favourite Quartzes?  

Here is a cute zoned Smoky/Amethyst scepter, I found this one in a small, exposed pocket on the side of a large boulder of pegmatite at our BBC Mine. The saturation changes drastically depending on the angle it is viewed.


6ED33F03-0303-426B-8A42-0C897934D17F.jpeg
 Mineral: Amethyst, Quartz (variety smoky)
 Locality:
El Dorado County, California, USA
 Dimensions: 3.5cm
 Description:
 Viewed:  830 Time(s)

6ED33F03-0303-426B-8A42-0C897934D17F.jpeg



121CCC75-687D-4F5B-B987-71208CC62511.jpeg
 Mineral: Amethyst
 Locality:
El Dorado County, California, USA
 Dimensions: 3.5
 Description:
 Viewed:  823 Time(s)

121CCC75-687D-4F5B-B987-71208CC62511.jpeg


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Eck Noch




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PostPosted: Jun 17, 2021 10:33    Post subject: Re: Favourite Quartzes?  

I mentioned the exceptional chlorite included Quartz that we found in the Epiphany Pocket that was worked 2016-2017. This is one of those, though a fairly small example.


88F28343-EDB5-42B9-AFCA-EC4588E1DDF5.jpeg
 Mineral: Quartz, Chlorite
 Locality:
El Dorado County, California, USA
 Dimensions: 2.5cm
 Description:
 Viewed:  822 Time(s)

88F28343-EDB5-42B9-AFCA-EC4588E1DDF5.jpeg



779E1CD1-8465-4145-9BB5-26BF886E7FA5.jpeg
 Mineral: Quartz, Chlorite
 Locality:
El Dorado County, California, USA
 Dimensions: 2.5cm
 Description:
 Viewed:  821 Time(s)

779E1CD1-8465-4145-9BB5-26BF886E7FA5.jpeg


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Eck Noch




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PostPosted: Jun 22, 2021 23:18    Post subject: Re: Favourite Quartzes?  

Some epitaxial Quartz on albite over feldspar twins. Some muscovite is present as well as a thin coating of cookeite. From our mine in Northern California.


A68EA7C9-B57F-4C24-BB02-0C62A1F1E82A.jpeg
 Mineral: Quartz (variety smoky), Albite, Muscovite, Cookeite
 Locality:
El Dorado County, California, USA
 Dimensions: 8cm
 Description:
 Viewed:  635 Time(s)

A68EA7C9-B57F-4C24-BB02-0C62A1F1E82A.jpeg


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Bob Morgan




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PostPosted: Jun 23, 2021 07:56    Post subject: Re: Favourite Quartzes?  

I'm enjoying your quartzes very much, particularly the lattice pieces,'gitterquartz'.. The Baveno twin explanation was new to me. I'm interested in quartz-feldspar epitaxy. Do you know of anything written about that phenomenon? 'Looking forward to more of your collection.
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Tobi




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PostPosted: Jul 07, 2021 04:52    Post subject: Re: Favourite Quartzes?  

Great pieces, wow, thank you for those wonderful contributions! Especially the 33 cm Morion Monster is a killer!

Like Bob said
Bob Morgan wrote:
Looking forward to more of your collection.
:-)
Best regards
Tobi
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