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Michael Shaw
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Location: Oklahoma



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Posted: Jan 19, 2013 10:59 Post subject: Re: Collection of Michael Shaw |
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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.
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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. |
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45418 Time(s) |

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

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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. |
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45343 Time(s) |

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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. |
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45311 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 20, 2013 15:30 Post subject: Re: Collection of Michael Shaw |
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In today's post I'll continue with specimens from Herja.
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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. |
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45298 Time(s) |

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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. |
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45276 Time(s) |

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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. |
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45236 Time(s) |

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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. |
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45308 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 21, 2013 11:08 Post subject: Re: Collection of Michael Shaw |
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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.
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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. |
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45120 Time(s) |

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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. |
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45248 Time(s) |

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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. |
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45170 Time(s) |

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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. |
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45309 Time(s) |

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

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Jordi Fabre
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Joined: 07 Aug 2006
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Michael Shaw
Site Admin

Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma



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Posted: Jan 21, 2013 18:15 Post subject: Re: Collection of Michael Shaw |
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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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Jordi Fabre
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Posted: Jan 21, 2013 18:44 Post subject: Re: Collection of Michael Shaw |
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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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Michael Shaw
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Location: Oklahoma



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Posted: Jan 22, 2013 10:21 Post subject: Re: Collection of Michael Shaw |
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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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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2249
Location: Oklahoma



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Posted: Jan 22, 2013 13:38 Post subject: Re: Collection of Michael Shaw |
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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.
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." |
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48777 Time(s) |

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Stibnite Baia Sprie, Maramures, Romania 5.7 x 6.2 cm. Stibnite crystals with a sword-shaped habit. |
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48833 Time(s) |

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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. |
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48590 Time(s) |

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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. |
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48621 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 23, 2013 10:56 Post subject: Re: Collection of Michael Shaw |
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A few more from Baia Sprie.
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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. |
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48584 Time(s) |

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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. |
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48658 Time(s) |

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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. |
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48574 Time(s) |

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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. |
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48628 Time(s) |

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GneissWare

Joined: 07 Mar 2008
Posts: 1287
Location: California



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Posted: Jan 23, 2013 12:57 Post subject: Re: Collection of Michael Shaw |
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"Stibnite crystals with a sword-shaped habit."
This is a really neat specimen, and quite unusual!
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Michael Shaw
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Posted: Jan 24, 2013 11:01 Post subject: Re: Collection of Michael Shaw |
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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
Description: |
Ferberite Baia Sprie, Maramures, Romania 5.6 x 6.9 cm. A nice combination specimen with bladed ferberite crystals on brassy chalcopyrite. |
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48470 Time(s) |

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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. |
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48444 Time(s) |

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Stibnite Baia Sprie, Maramures, Romania 6.5 x 8.5 cm. A classic specimen of splendent, bladed stibnite crystals with lustrous, white Baryte. |
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48466 Time(s) |

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

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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. |
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48443 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 25, 2013 10:42 Post subject: Re: Collection of Michael Shaw |
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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.
Description: |
Calcite ps. gypsum Cavnic, Maramures, Romania 3.4 x 6.2 cm. A divergent group of gypsum crystals pseudomorphed by grayish white calcite. |
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48543 Time(s) |

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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. |
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48454 Time(s) |

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Baryte Cavnic, Maramures, Romania 5.1 x 8.7 cm. Lustrous pale blue bladed Baryte crystals on light tan Baryte. |
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48427 Time(s) |

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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. |
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48455 Time(s) |

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Michael Shaw
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Posts: 2249
Location: Oklahoma



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Posted: Jan 26, 2013 08:43 Post subject: Re: Collection of Michael Shaw |
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A few more from Cavnic.
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Baryte Roata Mine, Cavnic, Maramures, Romania 4.0 x 6.5 cm. Straw-yellow, bladed Baryte crystals. Mined in 1996. |
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48362 Time(s) |

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

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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. |
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48350 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 29, 2013 09:49 Post subject: Re: Collection of Michael Shaw |
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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.
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. |
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48250 Time(s) |

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

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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. |
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48221 Time(s) |

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Chalcostibite Boldut Mine, Cavnic, Maramures, Romania FOV = 4.5 cm. Close up view of a portion of the above pictured specimen. |
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48254 Time(s) |

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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. |
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48325 Time(s) |

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Michael Shaw
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Location: Oklahoma



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Posted: Jan 30, 2013 13:50 Post subject: Re: Collection of Michael Shaw |
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More from Cavnic.
Description: |
Baryte Boldut Mine, Cavnic, Maramures, Romania 5.1 x 8.2 cm. |
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48201 Time(s) |

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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. |
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48184 Time(s) |

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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. |
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48173 Time(s) |

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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. |
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48219 Time(s) |

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