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Collection of Michael Shaw
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Michael Shaw
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PostPosted: Jan 19, 2013 10:59    Post subject: Re: Collection of Michael Shaw  

The mines at Herja have produced countless specimens of wonderfully crystallized minerals that grace museums and private collections worldwide. The Herja Mine lies approximately 6 km northeast of Baia Mare close to the small village of Chiuzbaia (formerly Kisbanya). Over 100 orebodies have been exploited during the past century, but all of the mines were closed as of 2006. Of the over 35 minerals that are well-known from Herja, lustrous, chisel-shaped stibnite, semseyite in fan-shaped groups, spherical white calcites, and wonderfully crystallized calcite groups heavily included with jamesonite are all highly sought after by collectors.


0302 Galena ps. pyrrhotite.jpg
 Description:
Galena ps. after pyrrhotite
Herja Mine, Baia Mare, Maramures Romania
7.0 x 7.5 cm.
Lustrous, steel-gray, galena oriented in linear plates replacing pyrrhotite with small tan-colored siderite crystals.
 Viewed:  45418 Time(s)

0302 Galena ps. pyrrhotite.jpg



1051 Calcite 2.jpg
 Description:
Calcite
Herja Mine, Baia Mare, Maramures Romania
3.0 x 4.5 cm.
Intergrown group of curved rhombic calcites heavily included with jamesonite.
 Viewed:  45334 Time(s)

1051 Calcite 2.jpg



1388 Stibnite.jpg
 Description:
Stibnite
Herja Mine, Baia Mare, Maramures Romania
4.8 x 6.3 cm.
Interconnected fan-shaped sprays of steel-gray stibnite with low angled terminations.
 Viewed:  45343 Time(s)

1388 Stibnite.jpg



1250 Calcite.jpg
 Description:
Calcite
Herja Mine, Baia Mare, Maramures Romania
5.5 x 6.5 cm.
Single creamy-white calcite on drusy quartz encrusting black sphalerite. From a unique pocket in the orebody mined in summer 2004.
 Viewed:  45311 Time(s)

1250 Calcite.jpg


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PostPosted: Jan 20, 2013 15:30    Post subject: Re: Collection of Michael Shaw  

In today's post I'll continue with specimens from Herja.


1029 Siderite.jpg
 Description:
Siderite
Herja Mine, Baia Mare, Maramures, Romania
1.2 x 8.6 cm.
A slender stalactite composed of stacked brown rhombic siderites with no point of attachment.
 Viewed:  45298 Time(s)

1029 Siderite.jpg



1278 Quartz.jpg
 Description:
Quartz
Herja Mine, Baia Mare, Maramures, Romania
5.2 x 6.6 cm.
Transparent quartz crystals to 1 cm. associated with lustrous, gray calcite spheres to 1.2 cm. which are uniformly included with jamesonite. Mined in 2001.
 Viewed:  45276 Time(s)

1278 Quartz.jpg



1359 Calcite.jpg
 Description:
Calcite
Herja Mine, Baia Mare, Maramures, Romania
5.1 x 8.7 cm.
Six interconnected calcite spheres sharply zoned light tan on one side and smoky gray on the other from abundant inclusions of jamesonite. Mined in 2003.
 Viewed:  45236 Time(s)

1359 Calcite.jpg



1355 Fizelyite.jpg
 Description:
Jamesonite ps. fizelyite
Herja Mine, Baia Mare, Maramures, Romania
6.0 x 8.2 cm.
Sprays of acicular fizelyite replaced by dark gray jamesonite on a plate of black sphalerite. This is a classic pseudomorph from Herja. Mined in 2001.
 Viewed:  45308 Time(s)

1355 Fizelyite.jpg


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PostPosted: Jan 21, 2013 11:08    Post subject: Re: Collection of Michael Shaw  

Today I will finish up Herja with one common species and a few of the rarer minerals that occur at Herja. Next up will be the mines at Baia Sprie.


0980 Calcite.jpg
 Description:
Calcite
Herja Mine, Baia Mare, Maramures, Romania
6.7 x 7.7 cm.
Multiple, flattened, stacked calcite rhombs on a matrix composed of small dolomite crystals and single calcite rhombs. The underside is composed of small quartz crystals many of which contain sulphide inclusions.
 Viewed:  45120 Time(s)

0980 Calcite.jpg



1398 Berthierite (2).jpg
 Description:
Berthierite
Herja Mine, Baia Mare, Maramures, Romania
6.0 x 6.1 cm.
Steel-grey, fibrous berthierite with a metallic luster and slight iridescent tarnish. Mined in 2000.
 Viewed:  45248 Time(s)

1398 Berthierite (2).jpg



0386 Semseyite.jpg
 Description:
Semseyite
Herja Mine, Baia Mare, Maramures, Romania
5.2 x 6.3 cm. FOV = 1.5 cm.
Numerous platy rosettes of metallic gray semseyite to 4 mm on a matrix of sphalerite and calcite.
 Viewed:  45170 Time(s)

0386 Semseyite.jpg



1740 Fizelyite.jpg
 Description:
Fizelyite
Herja Mine, Baia Mare, Maramures, Romania
3.7 x 5.2 cm. FOV = ~1.2 cm
Tiny groups of bladed fizelyite crystals to 0.25 cm scattered over a botryoidal crystallized brown siderite matrix from the type locality.
 Viewed:  45309 Time(s)

1740 Fizelyite.jpg



1729 Calcite.jpg
 Description:
Calcite
Herja Mine, Baia Mare, Maramures, Romania
5.2 x 5.6 cm.
Hemispherical-shaped crystallized cream-colored calcite.
 Viewed:  45149 Time(s)

1729 Calcite.jpg


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PostPosted: Jan 21, 2013 11:32    Post subject: Re: Collection of Michael Shaw  

crosstimber wrote:
Calcite
Herja Mine, Baia Mare, Maramures, Romania
6.7 x 7.7 cm.

Michael

This Calcite: https://www.mineral-forum.com/message-board/files/0980_calcite_105.jpg seems as from Turt...
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PostPosted: Jan 21, 2013 18:15    Post subject: Re: Collection of Michael Shaw  

I have had this specimen in my collection for 17 years. I acquired it from a dealer who used to spend a great deal of time in Romania, so I'm inclined to trust the label that came with the specimen. I also have a couple of similar specimens that were labeled as having come from Herja, and were acquired from another dealer who carried a lot of Romanian minerals. That being said, it certainly could be from another location. I just have to trust the label.
Michael
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PostPosted: Jan 21, 2013 18:44    Post subject: Re: Collection of Michael Shaw  

Thanks Michael, it should be OK. Turt is a relatively modern exploitation, so 17 years seems to be too old for Turt, and it is true that Herja supplied some Calcites looking like the famous ones from Turt....
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PostPosted: Jan 22, 2013 10:21    Post subject: Re: Collection of Michael Shaw  

Jordi Fabre wrote:
Thanks Michael, it should be OK. Turt is a relatively modern exploitation, so 17 years seems to be too old for Turt, and it is true that Herja supplied some Calcites looking like the famous ones from Turt....


Jordi,
After considering the above discussion, I decided to examine the calcite again as I hadn't seen it in hand for some time. One thing that I had forgotten, was the fact that the bottom side of the specimen is covered with small quartz crystals that are partially included with jamesonite. While both of these species occur at Turt, I believe that this is an association that is more characteristic of Herja, ie., "Herja diamonds" That and the fact that you mentioned Turt as being a relatively new exploit, pretty much satisfies whatever doubts I had.
Michael
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PostPosted: Jan 22, 2013 13:38    Post subject: Re: Collection of Michael Shaw  

Today I will show a few minerals from the well-known mining center at Baia Sprie, which is situated in the mountains about 9 km east of Baia Mare. The history of mining in Baia Sprie dates back to the 13th century, when it was known by it’s Hungarian name, Felsobanya. Through the centuries, numerous pits and shafts exploited the rich deposits. At least 45 minerals have been recorded from Baia Sprie, and it is the type locality for 5 minerals: andorite, felsobanyaite, klebelsbergite, semseyite, and szmikite.


0249 Stibnite (2).jpg
 Description:
Stibnite
Baia Sprie, Maramures, Romania
4.3 x 5.5 cm.
A divergent cluster of steel gray, striated crystals with low angle terminations. The label that came with this specimen attributed its location to the IPEG mine. While there is no documented mention of this mine in the literature, there were numerous shafts that exploited the large orebody at Baia Sprie, and one of these may have been worked by an exploration company named IPEG which apparently stands for "Intreprinderea de Prospectiuni si Explorari Geologice."
 Viewed:  48777 Time(s)

0249 Stibnite (2).jpg



1021 Stibnite (2).jpg
 Description:
Stibnite
Baia Sprie, Maramures, Romania
5.7 x 6.2 cm.
Stibnite crystals with a sword-shaped habit.
 Viewed:  48833 Time(s)

1021 Stibnite (2).jpg



0932 Barite.jpg
 Description:
Baryte
Baia Sprie, Maramures, Romania
7.2 x 8.6 cm.
Large creamy-white bladed crystals to 5.0 cm on edge with minor stibnite on the bottom of the specimen.
 Viewed:  48590 Time(s)

0932 Barite.jpg



1210 Barite (2).jpg
 Description:
Baryte
Baia Sprie, Maramures, Romania
3.7 x 5.4 cm.
Finely-bladed Baryte crystals included with realgar and jamesonite that impart a reddish-orange and gray coloration to the specimen. Mined in 2002.
 Viewed:  48621 Time(s)

1210 Barite (2).jpg


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PostPosted: Jan 23, 2013 10:56    Post subject: Re: Collection of Michael Shaw  

A few more from Baia Sprie.


1362 Bournonite D7000.jpg
 Description:
Bournonite
No. 6 Mine, Baia Sprie, Maramures, Romania
4.6 x 7.5 cm.
Steel-gray, striated, bournonite crystals to 0.8 cm scattered over a pyrite matrix. Mined in 2001.
 Viewed:  48584 Time(s)

1362 Bournonite D7000.jpg



1386 Realgar.JPG
 Description:
Realgar
No. 5 Mine, Baia Sprie, Maramures, Romania
4.0 x 4.3 cm.
Prismatic realgar crystals with hoppered terminations from the find in Nov./Dec. 2005.
 Viewed:  48658 Time(s)

1386 Realgar.JPG



1364 Scheelite (2).jpg
 Description:
Scheelite
Baia Sprie Mine,
4.1 x 6.3 cm.
Lustrous, smoky-gray, scheelite crystals with small laminar calcite crystals and brassy chalcopyrites. Mined in summer 2002.
 Viewed:  48574 Time(s)

1364 Scheelite (2).jpg



1300 Scheelite.JPG
 Description:
Scheelite
No. 6 Mine, Baia Sprie, Maramures, Romania
2.7 x 4.1 cm.
Unusual sherry-colored scheelite crystal with small calcite rhombs and transparent quartz crystals. Mined in 2001.
 Viewed:  48628 Time(s)

1300 Scheelite.JPG


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PostPosted: Jan 23, 2013 12:57    Post subject: Re: Collection of Michael Shaw  

"Stibnite crystals with a sword-shaped habit."

This is a really neat specimen, and quite unusual!
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PostPosted: Jan 24, 2013 11:01    Post subject: Re: Collection of Michael Shaw  

Thanks Bob. The stibnite with the steep angled terminations is one of my favorite Romanian specimens. I have never seen another one quite like it.

I will continue today with a few more specimens from Baia Sprie and travel a bit farther east to Cavnic tomorrow.
Michael



1723 Ferberite on chalcopyrite.jpg
 Description:
Ferberite
Baia Sprie, Maramures, Romania
5.6 x 6.9 cm.
A nice combination specimen with bladed ferberite crystals on brassy chalcopyrite.
 Viewed:  48470 Time(s)

1723 Ferberite on chalcopyrite.jpg



1356 Barite with orpiment.jpg
 Description:
Baryte
Baia Sprie Mine, Baia Sprie, Maramures, Romania
6.1 x 10.0 cm.
Bladed, semi-transparent, Baryte crystals with microscopic inclusions of yellow orpiment. The crystals have unusual modifications which give them a saw-tooth form.
 Viewed:  48444 Time(s)

1356 Barite with orpiment.jpg



1665 Barite on Stibnite.jpg
 Description:
Stibnite
Baia Sprie, Maramures, Romania
6.5 x 8.5 cm.
A classic specimen of splendent, bladed stibnite crystals with lustrous, white Baryte.
 Viewed:  48466 Time(s)

1665 Barite on Stibnite.jpg



1861 Marcasite ps. pyrrhotite.jpg
 Description:
Marcasite ps. pyrrhotite
Baia Sprie, Maramures, Romania
4.2 x 6.2 cm.
Sharp platy pyrrhotite crystals replaced by marcasite. Mined circa 1969.
 Viewed:  48471 Time(s)

1861 Marcasite ps. pyrrhotite.jpg



1968 Barite.jpg
 Description:
Baryte
Baia Sprie, Maramures, Romania
9.5 x 10.5 cm.
Glassy transparent tabular Baryte crystals covering a thin matrix. The Baryte crystals on the back of the specimen are heavily included with jamesonite.
 Viewed:  48443 Time(s)

1968 Barite.jpg


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PostPosted: Jan 25, 2013 10:42    Post subject: Re: Collection of Michael Shaw  

Today I will start showing a few specimens in my collection from the mines at Cavnic. I'm pretty sure most collectors are familiar with this locality and it's history, but for those who aren't - a little background.

The historic mining town of Cavnic is situated in a valley surrounded by the Gutin Mountains about 25 km east of Baia Mare. Mining at Cavnic dates to the 14th century when the town was known by it’s Hungarian name Kapnik or Kapnikbánya. In early times the deposits were worked for silver, gold and lead, while lead and zinc were sought during modern times. Like Baia Sprie and Herja, the deposits at Cavnic were accessed through numerous mines. The most notable mines during modern times are the Boldut, Cavnic, Roata, and Suior mines. The mineral assemblage at Cavnic was more diverse and more colorful than that of Baia Sprie and Herja with about 70 different species recorded. Cavnic is the type locality for rhodochrosite. All of the mines at Cavnic have been closed since 2008.



0186 Whewellite ps. gypsum.jpg
 Description:
Calcite ps. gypsum
Cavnic, Maramures, Romania
3.4 x 6.2 cm.
A divergent group of gypsum crystals pseudomorphed by grayish white calcite.
 Viewed:  48543 Time(s)

0186 Whewellite ps. gypsum.jpg



0268 Dolomite.jpg
 Description:
Dolomite
Cavnic, Maramures, Romania
6.1 x 8.7 cm.
White to pale tan dolomite rhombs arranged in several mounds on a quartz matrix. Small irridescent brown sphaerosiderites accent the specimen.
 Viewed:  48454 Time(s)

0268 Dolomite.jpg



0514 Barite.jpg
 Description:
Baryte
Cavnic, Maramures, Romania
5.1 x 8.7 cm.
Lustrous pale blue bladed Baryte crystals on light tan Baryte.
 Viewed:  48427 Time(s)

0514 Barite.jpg



0523 Tetrahedrite.jpg
 Description:
Tetrahedrite
Cavnic, Maramures, Romania
7.6 x 10.4 cm.
Metallic steel-gray tetrahedrite scattered over pale pink manganoan calcite on sulfide matrix with tiny transparent quartz crystals.
 Viewed:  48455 Time(s)

0523 Tetrahedrite.jpg


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PostPosted: Jan 26, 2013 08:43    Post subject: Re: Collection of Michael Shaw  

A few more from Cavnic.


0978 Barite.jpg
 Description:
Baryte
Roata Mine, Cavnic, Maramures, Romania
4.0 x 6.5 cm.
Straw-yellow, bladed Baryte crystals. Mined in 1996.
 Viewed:  48362 Time(s)

0978 Barite.jpg



0977 Quartz.jpg
 Description:
Quartz
Suior Mine, Cavnic, Maramures, Romania
8.2 x 10.1 cm.
Milky quartz crystals with transparent terminations associated with small brassy chalcopyrites.
 Viewed:  48339 Time(s)

0977 Quartz.jpg



0981 Calcite.jpg
 Description:
Calcite
Boldut Mine, Cavnic, Maramures, Romania
5.6 x 7.3 cm.
Tightly packed scalenohedral calcite crystals arranged to form two connected spheres set on a matrix of
lustrous tan dolomite.
 Viewed:  48350 Time(s)

0981 Calcite.jpg


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PostPosted: Jan 29, 2013 09:49    Post subject: Re: Collection of Michael Shaw  

I haven't been able to post any photos the past couple of days, but I have enjoyed viewing posts from other members. This morning I will resume with more specimens from Cavnic.


1190 Rhodochrosite.jpg
 Description:
Rhodochrosite
Boldut Mine, Cavnic, Maramures, Romania
7.1 x 9.5 cm.
Bladed pink rosettes with a pearly luster covering quartz/sulfide matrix. Collected in 2003.
 Viewed:  48250 Time(s)

1190 Rhodochrosite.jpg



1192 Gypsum.jpg
 Description:
Gypsum
Boldut Mine, Cavnic, Maramures, Romania
5.0 x 7.5 cm.
Stacked divergent white blades on a siderite matrix. Collected in 2002.
 Viewed:  48245 Time(s)

1192 Gypsum.jpg



1348 Chalcostibite.jpg
 Description:
Chalcostibite
Boldut Mine, Cavnic, Maramures, Romania
8.5 x 9.0 cm.
Sharp, bladed aggregates of dark gray, metallic chalcostibite with minor
tetrahedrite on a quartz matrix. Collected from a single find at this location in 2000.
 Viewed:  48221 Time(s)

1348 Chalcostibite.jpg



1348 Chalcostibite (2).jpg
 Description:
Chalcostibite
Boldut Mine, Cavnic, Maramures, Romania
FOV = 4.5 cm.
Close up view of a portion of the above pictured specimen.
 Viewed:  48254 Time(s)

1348 Chalcostibite (2).jpg



1353 Chalcopyrite (2).jpg
 Description:
Chalcopyrite
Boldut Mine, Cavnic, Maramures, Romania
6.0 x 6.1 cm.
Ivory-white, wafer-like calcite crystals with brassy, matte-luster chalcopyrite.
The habit of the calcite is reminiscent of material found in the late 1990s, but this piece was collected in 2005.
 Viewed:  48325 Time(s)

1353 Chalcopyrite (2).jpg


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PostPosted: Jan 30, 2013 13:50    Post subject: Re: Collection of Michael Shaw  

More from Cavnic.


1399 Barite.jpg
 Description:
Baryte
Boldut Mine, Cavnic, Maramures, Romania
5.1 x 8.2 cm.
 Viewed:  48201 Time(s)

1399 Barite.jpg



1404 Sphalerite.jpg
 Description:
Sphalerite
Boldut Mine, Cavnic, Maramures, Romania
4.5 x 5.0 cm
Lustrous, black sphalerite to 4.5 cm, in combination with transparent quartz and light brown dolomite, Cavnic isn't known for producing good sphalerites. This one was collected in 2004.
 Viewed:  48184 Time(s)

1404 Sphalerite.jpg



1407 Calcite.JPG
 Description:
Calcite
Boldut Mine, Cavnic, Maramures, Romania
4.0x 6.0 cm.
Colorless calcites to 4 cm composed of multiple acute scalenohedral crystals set on a matrix of lustrous tan siderite. Collected in 2001.
 Viewed:  48173 Time(s)

1407 Calcite.JPG



1548 Gypsum (2).jpg
 Description:
Gypsum
Boldut Mine, Cavnic, Maramures, Romania
8.0 x 9.0 cm.
Colorless, transparent crystals to 8.0 cm in length on light brown siderite. Collected in 1990.
 Viewed:  48219 Time(s)

1548 Gypsum (2).jpg


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