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Andradite N to Z

Posted by Rock Currier  
avatar Andradite N to Z
July 17, 2011 10:40AM
This article has been prepared for the Mindat Best Minerals project. The aim of this project is to present information on important localities and specimens for each mineral specie. As new finds are made and new knowledge is made available the individual articles will be revised to include this information. Readers are encouraged to contribute by posting a response in this thread. All revisions will be stored, thus ensuring traceability and availability of previously included information. A complete list of articles can be found in the list of finished Best Minerals articles. To cite this version: Currier, R. (2011) Andradite N to Z. revision 1.0. Mindat Best Minerals Project, article "mesg-66-230449". Please be advised that the photos cannot be used without the consent of the copyright holder



Andradite,
Namibia,
Erongo Region, Karibib District, Tubussis 22 farm (Tubussis; Tubusis; Tubessis)

Andradite v. demantoid ~1cm
Andradite, 4.4cm wide
Andradite v. demantoid ~1cm
Andradite, 4.4cm wide
Andradite v. demantoid ~1cm
Andradite, 4.4cm wide

Andradite v. demantoid 5cm wide
Andradite 5.7cm wide
Andradite v. demantoid 5cm wide
Andradite 5.7cm wide
Andradite v. demantoid 5cm wide
Andradite 5.7cm wide

Andradite 2.2cm wide
Andradite on Quartz, 3.2cm wide
Andradite 2.2cm wide
Andradite on Quartz, 3.2cm wide
Andradite 2.2cm wide
Andradite on Quartz, 3.2cm wide

Andradite on Quartz 1.7cm tall
Andradite on Quartz 1.7cm tall
Andradite on Quartz 1.7cm tall


This locality has sparingly produced good specimens of the demantoid variety of Andradite and some others as well. Many of the best ones were marketed by Charles Kee who has recently spent a lot of time living in Namibia.



Andradite,
Norway,
Aust-Agder, Arendal

“In large dodecahedrons at Arendal in Aust-Agder… .”1 There are a couple of pictures of Andradite crystals from this locality here on mindat, but they are less than compelling. Certainly some red patriotic Norwegian collector can supply is with a good picture of a fine Andradite specimen from this famous old locality.
1. A Textbook of Mineralogy, Edward Dana, William Ford, 4th edition, 1926, p. 596.


Andradite,
Norway,
Aust-Agder, Gjerstad

Andradite ~8cm wide
Andradite ~8cm wide
Andradite ~8cm wide


The specimen pictured above is an old one and is in the British Museum of Natural History. The black Andradite crystals up to about 12 mm are associated with feldspar crystals. Even though the specimen must have been exceptional in its day, because of the amount of damage on the specimen, it would not be thought highly of by modern collectors. You never see these specimens offered for sale.

Olav Revheim writes 2009: The Arendal and Gjerstad locations are distinct locations and refers to administrative units (municipalities) in Aust Agder, Norway. Both locations belongs to the same geological province (the bamble formation), and the andradite from this area is found in iron rich skarns with magnetite, diopside, quartz, epidote, scapolite (probably marialite). Several of these skarn occurances has been mined for iron. The first mine (Barbu) opened in1585 and the Bråstad mine was not shut down until the 1970-ties. There has been dozens of mining operations in these skarns, and even more locations that has not been mined. Today most of these locations are lost through urban development and flooded mine shafts. The best crystals can be quite good, and I think I remember some excellent specimens from the local museum in Arendal. I cannot recall the crystal size. These specimens are rare on the marked today, and I would suspect that the best specimens can be found in European Museum collections and older private collections in Norway. I suggest that the location Arendal Iron mines or more correctly "Greater Arendal iron skarn locations" can be used for these andradites, just noting that some of these iron mines are located outside the current Arendal municipality. Also the Grua area and Drammensmarka are good Norwegian andradite locations. As soon as we have some good images of these specimens uploaded to mindat, we will include them here. Here is a map that may help you orient the locality.


Andaradite,
Norway,
Buskerud, Drammen, Drammensmarka, 5 Minuite

Andradite 11cm wide
Andradite 10cm wide
Andradite 11cm wide
Andradite 10cm wide
Andradite 11cm wide
Andradite 10cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
Norway,
Finnmark, Hasvik, Sørøya, Haraldseng

Andradite on Calcite 6cm wide
Andradite on Calcite 6cm wide
Andradite on Calcite 6cm wide



Andradite,
Norway,
Oppland, Lunner, Grua, Grua Tunnel

Andradite in Calcite 6cm wide
Andradite in Calcite 6cm wide
Andradite in Calcite 6cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
Pakistan,
Khyber Pakhtunkhwa (North-West Frontier Province), Malakand Region, Swat District (Swat Valley), Mullah Yusef

Andradite 7.2cm tall
Andradite 7.2cm tall
Andradite 7.2cm tall



Andradite,
Pakistan,
Northern Areas, Baltistan, Skardu District, Haramosh Mts., Shengus (Shingus)

Andradite, 6.1cm
Andradite, 5.9cm wide
Andradite, 6.1cm
Andradite, 5.9cm wide
Andradite, 6.1cm
Andradite, 5.9cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
Peru,
Huancavelica Department, Castrovirreyna Province, Castrovirreyna District, Pampa Blanca, Rosario Mabel claim (Flor de Peru II claim)

Andradite & Quartz 6cm wide
Andradite & Quartz 6.5cm tall
Andradite & Quartz 6cm wide
Andradite & Quartz 6.5cm tall
Andradite & Quartz 6cm wide
Andradite & Quartz 6.5cm tall

Andradite 10.0cm wide
Andradite 10.0cm wide
Andradite 10.0cm wide



Andradite,
Peru,
Ica Department, Pisco Province, Quebrada Rio Seco

Andradite 11,2cm
Andradite 11,2cm
Andradite 11,2cm



Andradite,
Poland,
Évora District, Évora, Arraiolos

Andradite 6cm wide
Andradite 6cm wide
Andradite 6cm wide



Andradite,
Portugal,
Lisboa District, Sintra, Linhó

Andradite 4cm wide
Andradite 4cm wide
Andradite 4cm wide


We need someone to tell us about the Andradites from this locality.


Andradite,
Portugal,
Portalegre District, Monforte

Andradite 7cm wide
Andradite 6cm wide
Andradite 7cm wide
Andradite 6cm wide
Andradite 7cm wide
Andradite 6cm wide

Andradite xls to 1cm
Andradite xls to 2cm
Andradite xls to 1cm
Andradite xls to 2cm
Andradite xls to 1cm
Andradite xls to 2cm

Andradite 3.5cm tall
Andradite 8.5cm tall
Andradite 3.5cm tall
Andradite 8.5cm tall
Andradite 3.5cm tall
Andradite 8.5cm tall


We need someone to tell us about the Andradites from this locality.


Andradite,
Romania,
Caras-Severin Co., Banat Mts, Ocna de Fier-Dognecea District, Dognecea (Dognácska; Dognaczka)

Andradite 5.3cm wide
Andradite 8cm wide
Andradite 5.3cm wide
Andradite 8cm wide
Andradite 5.3cm wide
Andradite 8cm wide

Andradite 4.5cm wide
Andradite 4.5cm wide
Andradite 4.5cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
Russia,
Eastern-Siberian Region, Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai), Bolshaya Irba Village, Irbinskoe (Irbinskoye) deposit

Andradite 10cm tall
Andradite 10cm tall
Andradite 10cm tall



Andradite,
Russia,
Eastern-Siberian Region, Prebaikalia (Pribaikal'e), Irkutskaya Oblast', Zheleznogorsk, Korshunovskoye (Korzunovskoe; Korzhunovska; Korshunovskiy) Iron mine

Andradite 3.4 & 2.9cm
Andradite 3.4 & 2.9cm
Andradite 3.4 & 2.9cm


We need someone to tell us about the Andradite garnets from this locality.


Andradite,
Russia,
Eastern-Siberian Region, Saha Republic (Sakha Republic; Yakutia), Vilyui River Basin (Vilui River Basin; Wilui River Basin), Chernyshevsk

No pictures available

Euhedral sea green to olive green crystals, usually singles up to about 3 cm in diameter. These have come trickling out over a period of years and though interesting can usually be had for less than $50. Certainly at one time they were locally abundant.


Andradite,
Russia,
Far-Eastern Region, Chukotskii Autonomous Okrug, Tamvatney, Anadyr

Andradite 3.8cm wide
Andradite 3.8cm wide
Andradite 3.8cm wide



Andradite,
Russia,
Far-Eastern Region, Primorskiy Kray, Dal'negorsk (Dalnegorsk; Tjetjuche; Tetjuche) Dal'negorsk B deposit, Bor Pit (Boron Pit; Bor Quarry)

Andradite & Quartz 5cm
Andradite, 5.5cm wide
Andradite & Quartz 5cm
Andradite, 5.5cm wide
Andradite & Quartz 5cm
Andradite, 5.5cm wide

Andradite, 5.3cm
Aandradite, 6.4cm wide
Andradite, 5.3cm
Aandradite, 6.4cm wide
Andradite, 5.3cm
Aandradite, 6.4cm wide

Andradite 3.4cm wide
Andradite 6.3cm wide
Andradite 3.4cm wide
Andradite 6.3cm wide
Andradite 3.4cm wide
Andradite 6.3cm wide

Andradite 30cm wide
Andradite 3.4cm wide
Andradite 30cm wide
Andradite 3.4cm wide
Andradite 30cm wide
Andradite 3.4cm wide

Andradite 3.7cm wide
Andradite 5cm wide
Andradite 3.7cm wide
Andradite 5cm wide
Andradite 3.7cm wide
Andradite 5cm wide

Andradite 6.3cm wide
Andradite & Hedenbergite 6.0cm
Andradite 6.3cm wide
Andradite & Hedenbergite 6.0cm
Andradite 6.3cm wide
Andradite & Hedenbergite 6.0cm

Andradite 5.2cm wide
Andradite & Quartz 4.6cm wide
Andradite 5.2cm wide
Andradite & Quartz 4.6cm wide
Andradite 5.2cm wide
Andradite & Quartz 4.6cm wide


These are collected from a large open pit mine that opens almost right in the center of town. It is a skarn and they are mining Datolite for the production of Borate minerals. The mine usually has many open pockets on its benches and has produced probably the finest specimens of daotlite known. It is also well known for its Axinite, Hedenbergite and Ilvaite and Calcite specimens. When Russia was a fortress economy during the cold war, such a mine could be justified, but although the mine is still operating on a small scale it is not profitable to run. The reason is that it is much more costly to extract borates from Datolite than from crystallized borax which is being currently mined in Turkey, California and Argentina



Andradite,
Russia,
Far-Eastern Region, Primorskiy Kray, Dal'negorsk (Dalnegorsk; Tjetjuche; Tetjuche), Kavalerovo Mining District, Sinerechenskiy Mine; Blue River), Sinerechenskoe skarn occurrence (Sinerechenskoye; Sineretschenskoye

Andradite, 10cm wide
Andradite, ~12cm wide
Andradite, 10cm wide
Andradite, ~12cm wide
Andradite, 10cm wide
Andradite, ~12cm wide

Andradite, 5.5cm wide
Andradite, 7.5cm wide
Andradite, 5.5cm wide
Andradite, 7.5cm wide
Andradite, 5.5cm wide
Andradite, 7.5cm wide

Andradite 3.9cm tall
Andradite 10cm tall
Andradite 3.9cm tall
Andradite 10cm tall
Andradite 3.9cm tall
Andradite 10cm tall

Andradite 8cm wide
Andradite 3.7cm wide
Andradite 8cm wide
Andradite 3.7cm wide
Andradite 8cm wide
Andradite 3.7cm wide

Andradite 10.9cm wide
Andradite 11.4cm, wide
Andradite 10.9cm wide
Andradite 11.4cm, wide
Andradite 10.9cm wide
Andradite 11.4cm, wide

Andradite 6.7cm wide
Andradite 8.7cm wide
Andradite 6.7cm wide
Andradite 8.7cm wide
Andradite 6.7cm wide
Andradite 8.7cm wide


It is a really big skarn and besides the open pit mine where they mine Datolite for the production of borates, there are a number of base metal deposits that have been mined over the years and some of the mines are still active. This district is not particularly well known for its andradite specimens, but as you can see from the above images, they have produced many fine specimens.


Andradite,
Russia,
Northern Caucasus Region, Kabardino-Balkarian Republic, Baksan Valley, Tyrnyauz Mo-W Deposit

Andradite & Quartz 6.5cm wide
Andradite & Quartz 6.5cm wide
Andradite & Quartz 6.5cm wide



Andradite,
Russia,
Urals Region, Middle Urals, Ekaterinburgskaya (Sverdlovskaya) Oblast', Asbest, Bazhenovskoe deposit

Andradite 11.2cm wide
Andradite 8cm wide
Andradite 11.2cm wide
Andradite 8cm wide
Andradite 11.2cm wide
Andradite 8cm wide

Andradite 5cm wide
Andradite 4cm wide
Andradite 5cm wide
Andradite 4cm wide
Andradite 5cm wide
Andradite 4cm wide

Andradite ~5cm wide
Andradite 2cm wide
Andradite ~5cm wide
Andradite 2cm wide
Andradite ~5cm wide
Andradite 2cm wide

Andradite on Diopside 2.4cm wide
Andradite on Diopside 2.4cm wide
Andradite on Diopside 2.4cm wide



Andradite,
Russia,
Urals Region, Middle Urals, Ekaterinburgskaya (Sverdlovskaya) Oblast', Ekaterinburg (Sverdlovsk), Poldnevaya village

Andradite var. demantoid ~14mm wide
Andradite var. demantoid ~14mm wide
Andradite var. demantoid ~14mm wide



Andradite,
Russia,
Urals Region, Southern Urals, Chelyabinsk Oblast', Korkodin, Korkodinskoe (Karkodinskoe; Novo-Karkodinskoe) demantoid deposit

Andradite 3.4cm wide
Andradite 3.4cm wide
Andradite 3.4cm wide



Andradite,
Russia,
Northern Region, Karelia Republic, Ladoga Region, Pitkyaranta (Pitkäranta) District, Sortavala, Kitelskoe (Kitelsk; Kitelskoye) Sn-Zn deposit

Andradite, ~7cm across
Andradite, ~7cm across
Andradite, ~7cm across


This specimen is in the British Museum of Natural History. The locality is mentioned in Dana's Text 4th edition as being from Finland. Since that time Russia took over the territory and now the locality is in Russia. The specimens were fairly abundant at one time and the specimen pictured was considered to be a good specimen. It has fairly sharp if not shiny black crystals to about 12 mm. You rarely see them for sale.


Andradite,
Russia,
Northern Region, Murmanskaja Oblast', Kola Peninsula, Kovdor Massif, Kovdor Mine

Andradite v. demantoid, 6cm wide
Andradite v. demantoid close up
Andradite v. demantoid, 6cm wide
Andradite v. demantoid close up
Andradite v. demantoid, 6cm wide
Andradite v. demantoid close up


We need someone to tell us about the Andradite specimens from this mine.


Andradite,
South Africa,
Northern Cape Province, Kalahari manganese fields, Wessels Mine (Wessel's Mine), Hotazel

Andradite, 6.3cm wide
Andradite on Hematite 13.3cm wide
Andradite, 6.3cm wide
Andradite on Hematite 13.3cm wide
Andradite, 6.3cm wide
Andradite on Hematite 13.3cm wide

Andradite after Rhodochrosite with Gaudefroyite 5.5cm wide
Same as left 5.6cm tall
Andradite after Rhodochrosite with Gaudefroyite 5.5cm wide
Same as left 5.6cm tall
Andradite after Rhodochrosite with Gaudefroyite 5.5cm wide
Same as left 5.6cm tall

Andradite, 4.6cm wide
Andradite 4.3cm wide
Andradite, 4.6cm wide
Andradite 4.3cm wide
Andradite, 4.6cm wide
Andradite 4.3cm wide

Andradite @ Rhodochrosite 5.6cm
Andradite on Hematite 7.3cm tall
Andradite @ Rhodochrosite 5.6cm
Andradite on Hematite 7.3cm tall
Andradite @ Rhodochrosite 5.6cm
Andradite on Hematite 7.3cm tall

Andradite 5.2cm tall
Andradite 6.2cm wide
Andradite 5.2cm tall
Andradite 6.2cm wide
Andradite 5.2cm tall
Andradite 6.2cm wide


These are manganese mines and are not far from Kuraman. The best andradite specimens have been found at the Wessels mine. “Colors vary from brown and red-brown to yellowish red, with smaller orange and red translucent crystals and two occurrences from Wessels of pale-green crystals. Crystal sizes varies from less than 1 mm to 15 mm, averaging abound 5 mm.”1 These andradite crystals are not particularly notable, but their association with crystals of hausmannite, barite, calcite, celestite, hematite, tephroite and sturmanite often makes striking and mineralogically fascinating specimens.
1. Mineralogical Record, Vol. 22, 1991, p 281.


Andradite ,
South Africa,
Northern Cape Province, Kalahari manganese fields, N'Chwaning Mines, N'Chwaning II Mine

Andradite on Hematite 3.2cm wide
Andradite, 6cm wide
Andradite on Hematite 3.2cm wide
Andradite, 6cm wide
Andradite on Hematite 3.2cm wide
Andradite, 6cm wide

Andradite 3.1cm tall
Andradite 3.1cm tall
Andradite 3.1cm tall


We need someone to tell us about the andradite specimens from this mine.


Andradite,
Spain,
Andalusia, Huelva, Cala, Cala Mines, Manuel-Mercedes Mine

1.2cm Andradite
2.5cm tall
1.2cm Andradite
2.5cm tall
1.2cm Andradite
2.5cm tall



Andradite,
Spain,
Asturias, Salas, Carlés, Carlés Mine

Andradite, Actinolite & Titanite 14cm wide
Andradite, Actinolite & Titanite 14cm wide
Andradite, Actinolite & Titanite 14cm wide



Andradite,
Spain,
Extremadura, Badajoz, Burguillos del Cerro, Milucha Mine

Andradite 4cm wide
Andradite 4cm wide
Andradite 4cm wide



Andradite,
Spain,
Extremadura, Badajoz, Burguillos del Cerro, Monchi Mine

Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide



Andradite,
Spain,
Extremadura, Badajoz, Monesterio, Aguablanca Mine (Agua Blanca Mine)

Andradite & Epidote 4.6cm high
Andradite, 1.8cm wide
Andradite & Epidote 4.6cm high
Andradite, 1.8cm wide
Andradite & Epidote 4.6cm high
Andradite, 1.8cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
Sweden,
Gästrikland, Hofors, Torsåker, Linderås Mines

Andradite ~15cm wide
Andradite ~15cm wide
Andradite ~15cm wide



Andradite,
Sweden,
Lappland, Ultevis

Andradite & Svabite ~3.3cm wide
Andradite & Svabite ~3.3cm wide
Andradite & Svabite ~3.3cm wide



Andradite,
Switzerland,
Wallis (Valais), Zermatt - Saas Fee area

Andradite, FOV 5mm
Andradite, FOV 5mm
Andradite, FOV 5mm


We need someone to tell us about the andradite specimens from this locality.


Andradite,
UK,
Scotland, Buchan Grampian (Aberdeenshire), Aberdeen, Rubislaw Quarry

Andradite, ~6cm wide
Andradite, ~6cm wide
Andradite, ~6cm wide


This old British Museum specimen, exceptional for the UK, would not be of interest except to those who specialize in minerals from UK. It does have a classical ding in the classical spot. Andradite (melanite) garnets are an essencial ingredient of the rock called Borrolanite near loch Borrolan, Sutherland, in the north west of Scotland.1
1. Emial communication Spencer I. Mather 2009.


Andradite,
USA,
Alaska,Prince of Wales-Outer Ketchikan Borough, Prince of Wales Island, Copper Mountain

Andradite, 5cm wide
Andradite, 5cm wide
Andradite, 5cm wide


The specimen above may be the best one from this locality you will ever see.



Andradite,
USA,
Arizona, Gila Co., Dripping Spring Mts, Banner District, Christmas area, Christmas, Dripping Springs Mountains Garnet deposit

Andradite 5.5cm tall
Andradite 5.5cm tall
Andradite 5.5cm tall



Andradite,
USA,
Arizona, Graham Co., Gray Throne prospect (Gray Thorne

Andradite, 4.8cm wide
Andradite, 4.8cm wide
Andradite, 4.8cm wide


You may never see another good Andradite specimens from this location. Very Rare.



Andradite,
United States,
Arizona, Graham Co., San Carlos Indian Reservation, Santa Teresa Mts, Stanley District, Quartzite Mountain Garnets), Quartzite Mountain, (Stanley Butte

Andradite, 8cm wide
Andradite ~7cm wide.
Andradite, 8cm wide
Andradite ~7cm wide.
Andradite, 8cm wide
Andradite ~7cm wide.

Andradite & Quartz 2.5cm wide
Andradite, 2.2cm wide
Andradite & Quartz 2.5cm wide
Andradite, 2.2cm wide
Andradite & Quartz 2.5cm wide
Andradite, 2.2cm wide

Andradite 6cm wide
Andradite 5cm wide
Andradite 6cm wide
Andradite 5cm wide
Andradite 6cm wide
Andradite 5cm wide

Andradite 9.5cm wide
Andradite 8.9cm wide
Andradite 9.5cm wide
Andradite 8.9cm wide
Andradite 9.5cm wide
Andradite 8.9cm wide

Andradite 4.8cm wide
Andradite 4.9cm wide
Andradite 4.8cm wide
Andradite 4.9cm wide
Andradite 4.8cm wide
Andradite 4.9cm wide

Andradite & Quartz 6cm wide
Andradite 9.1cm tall
Andradite & Quartz 6cm wide
Andradite 9.1cm tall
Andradite & Quartz 6cm wide
Andradite 9.1cm tall

Andradite 4.8cm wide
Andradite 4.8cm wide
Andradite 4.8cm wide


One of the best known localities for andradite in the United States is Stanley Buttes. Over the years, in the last half of the 20th century, many specimens of free standing greenish brown crystals have been collected and sold to collectors. Crystals to about 5 cm in diameter are reported. Most crystals are less than 2 cm in diameter, opaque, and not very shiny, but make pleasing specimens. The crystals are almost always found growing wall to wall and I don’t think I have ever seen a specimen with isolated crystals. I suppose that the best specimens from here might bring two or three hundred dollars and you should be able to get a decent one for less than $50. The locality is on the edge of an Indian reservation and collecting is usually not permitted. If access were unrestricted there would be many more good specimens from this locality available on the market. Most of the specimens pictures above are not typical. Only the first one on the left is somewhat representative of the locality, but it is a fine specimen from there.



Andradite,
USA,
Arizona, Santa Cruz Co., Patagonia Mts, Patagonia District, Washington Camp-Duquesne District

Andradite 12.3cm wide
Andradite 12.3cm wide
Andradite 12.3cm wide



Andradite,
USA,
Arkansas, Garland County, Magnet Cove

“Some fine melanite crystals occur in Magnet Cove, Garland County”1 I have never seen any. Perhaps someone out there can point me to some or send me an image of a good specimen?
1. Mineralogy for Amateurs, Sinkankas, p539.


Andradite,
USA,
California, Calaveras Co., Garnet Hill, Miracle Mountain Mine

Andradite, 4cm wide
Andradite 8.8cm wide
Andradite, 4cm wide
Andradite 8.8cm wide
Andradite, 4cm wide
Andradite 8.8cm wide


This locality has been collected at for years by collectors. Many hundreds of specimens have been produced, but very few of them are complete and without damage.



Andradite,
USA,
California, Calaveras Co., Garnet Hill

Andradite, 6cm wide
Andradite & Epidote, 7.6cm
Andradite, 6cm wide
Andradite & Epidote, 7.6cm
Andradite, 6cm wide
Andradite & Epidote, 7.6cm

Andradite, 6.2cm wide
Andradite, 6.2cm wide
Andradite, 6.2cm wide


Here are found “Fine brown andradite crystals to 2” in diameter, with quartz, calcite and epidote” according to (Sinkankas, Mineralogy p539). These crystals are usually found growing wall to wall and frequently exhibit damage due to the way they grow and the methods used in collecting them. Decent specimens from this locality can be had from time to time for less than $50. They would be more abundant if they were easier to collect or if there was more demand for them. The specimen pictured here is about 8 cm in diameter and must be one of the best ever collected at the locality.



Andradite,
USA,
California, Riverside Co., Nuevo

Andradite, 5cm across
Andradite, 5cm across
Andradite, 5cm across


The specimen is know for its Andradite garnets but the crystals are rarely free standing and it takes a minor miracle to have one break out clean like this onw, which is perhaps the best one ever found.



Andradite,
USA,
California, San Benito Co., New Ideira District

Andradite, 5cm wide
Andradite v. topazolite, 2cm wide
Andradite, 5cm wide
Andradite v. topazolite, 2cm wide
Andradite, 5cm wide
Andradite v. topazolite, 2cm wide

Andradite, 8.2cm wide
5mm Andradite xl
Andradite, 8.2cm wide
5mm Andradite xl
Andradite, 8.2cm wide
5mm Andradite xl

Andradite 5.7cm wide
Andradite ~8cm wide
Andradite 5.7cm wide
Andradite ~8cm wide
Andradite 5.7cm wide
Andradite ~8cm wide

Andradite 6.7cm wide
Andradite 6.7cm wide
Andradite 6.7cm wide


Good specimens of black melanite crystals and a few good specimens of the topazolite variety of andradite are found at various localities in San Benito County. The melanite crystals from here are exceptionally sharp and shiny though rarely reaching a cm in size. The crystals are found freestanding in shrinkage cracks in the metamorphic rocks of the region and though they are usually smaller than a centimeter in diameter, their sharpness and brilliant luster makes them very attractive to collectors. The few very good melanites that have been found would probably command more than a thousand dollars but most of the specimens from here will bring less than a hundred and representative specimens can be had for much less.

The topazolite variety occur in translucent to transparent amber to greenish brown freestanding crystals that have a devoted following and I have seen a few pleasant specimens, but nothing that would start a riot. This variety is much less common than the melanite variety. The largest crystals might reach about a cm. Steve Smale of Berkley, California has the best specimen of this variety that I have seen and it is probably worth somewhere from $5000 to $10,000 dollars. It is much better than the next best one I have seen. Field collectors that frequent San Benito County and those who lust after California specimens look at this specimen and weep.



Andradite,
USA,
California, San Benito Co., New Idria District, Yellow Cat Mine

Andradite v. topazolite, 3.9cm wide
Andradite v. topazolite, 3.9cm wide
Andradite v. topazolite, 3.9cm wide


We need someone to tell us about the Andradite specimens from this locality.


Andradite,
USA,
Colorado, Fremont Co., Eight Mile Park pegmatite District, Mica Lode mine (Mica Hill Mine)

Andradite, 2cm wide
Andradite, 2cm wide
Andradite, 2cm wide


This is not a very significant specimen and perhaps we should not have included it here. We may remove it at a later date if we can find out nothing about the locality.



Andradite,
USA,
Idaho, Adams Co., Seven Devils District, Cuprum, Peacock Mine (South Peacock; Darland; Peacock & South Peacock)

Andradite 2.3cm wide
Andradite 2.3cm wide
Andradite 2.3cm wide



Andradite,
USA,
Idaho, Latah Co. Emerald Creek

Andradite 4cm tall
Andradite 4cm tall
Andradite 4cm tall



Andradite,
USA,
Nevada, Pershing Co., Nightingale District

Andradite 6.5cm wide
Andradite 6.5cm wide
Andradite 6.5cm wide



Andradite,
USA,
New Jersey, Sussex County, Franklin

Andradite in Calcite, ~8cm wide
Andradite, ~8cm wide
Andradite in Calcite, ~8cm wide
Andradite, ~8cm wide
Andradite in Calcite, ~8cm wide
Andradite, ~8cm wide

Andradite in Calcite ~4cm wide
Andradite 6.8cm wide
Andradite in Calcite ~4cm wide
Andradite 6.8cm wide
Andradite in Calcite ~4cm wide
Andradite 6.8cm wide

Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide

Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide
Andradite 7cm wide


There are some collectors of minerals that think that the sun rises and sets on the minerals from Franklin and will pay amazing prices for fine andradite garnets and other specimens from these deposits. These garnets are usually brown, can be 8 cm across, but are usually damaged. Some specimens have smaller shiny black crystals but again almost all show substantial damage. These crystals, like most of the minerals at Franklin and Sterling Hill, do not grow free standing in pockets. Similar looking garnet specimens from other localities would many times be thrown as not worth having. I have always considered this fascination and mania for Franklin to be some sort of local temporary madness, but it has been going on now for over a hundred years, and there is no sign that sanity is returning to those afflicted. I am including these pictures mostly because the collectors who love this stuff will be upset if I don't



Andradite,
USA,
New Jersey, Sussex County, Balls Hill

No picture available

“Very brilliant black dodecahedrons were found, one of which is recorded as nearly 7” diameter…”.1 I have never seen any. Does any one out there know where there is a fine specimen?
1. Mineralogy for Amateurs, Sinkankas. P539.


Andradite,
USA,
New Mexico, Otero Co., Orogrande District, Orogrande, Jarilla Mountains

Andradite 3cm wide
Andradite 4cm wide
Andradite 3cm wide
Andradite 4cm wide
Andradite 3cm wide
Andradite 4cm wide

Andradite, Quartz & Hematite 3cm wide
Andradite, Quartz & Hematite 3cm wide
Andradite, Quartz & Hematite 3cm wide



Andradite,
USA,
Pennsylvania, Lebanon Co., Cornwall, Cornwall Mines

Andradite, 43cm wide
Andradite, 43cm wide
Andradite, 43cm wide


The mines here “are noted for dark olive-green striated trapezohedrens to 2¼” diameter.”1 Genth reports crystals over 1 cm in 1875. A decent 10 cm specimen with one of the crystals about 2 cm across is in the Jefferis collection at the Carnegie Museum of Natural History in Pittsburgh, Pennsylvania. At Cornwall in Lebanon County, sharp striated, bronzy-green dodecahedrons to 3 cm have been found. I have never seen one I would want to put in my collection nor a good one for sale. But I would make an exception for the one pictured above.
1. Mineralogy for Amateurs, Sinkankas. P539.


Andradite,
USA,
Pennsylvania, York Co., Steelton quadrangle, Reeser's Summit

Andradite 5.5cm wide
Andradite 5.5cm wide
Andradite 5.5cm wide



RevisionHistory

Revision no date description editor
1.0 July 15. 2011 First Draft Rock Currier



Click here to view Best Minerals, Andradite A to M. Click here to view Best Minerals A and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.



Edited 15 time(s). Last edit at 12/15/2015 09:12PM by Olav Revheim.
Re: Andradite N to Z
July 18, 2011 03:22AM

Adradite from Ball's Hill, Franklin, NJ (#1) 10 x 12 cm
Andradite from Franklin, NJ (#2) 6 x 7 cm
Andradite from Franklin, NJ (#3) 7 cm wide
Attachments:
open | download - Garnet1.jpg (133.1 KB)
open | download - Garnet2.jpg (94.3 KB)
open | download - Garnet3.jpg (95.8 KB)
Re: Andradite N to Z
July 18, 2011 03:28AM

Andradite, from Franklin, NJ (#4) 7 x 6 cm
Andradite, from Franklin, NJ (#5) 7 x 4 cm
Attachments:
open | download - Garnet4.jpg (116.3 KB)
open | download - Garnet5.jpg (79.3 KB)
avatar Re: Andradite N to Z
July 18, 2011 03:42AM
Steven,
Those images are possibly worth of inclusion in the article, but they would first have to be uploaded to the Mindat gallery and not just as attachments to a thread posting. Do you need instructions on how to to that? How to upload mineral images to mindat.

Rock Currier
Crystals not pistols.
Re: Andradite N to Z
July 18, 2011 03:45AM

Andradite, from Franklin, NJ 8 x 7 cm
Attachments:
open | download - Andradite franklin.jpg (134.2 KB)
Re: Andradite N to Z
July 18, 2011 04:12AM
Rock, I have uploaded the first five images the regular way to the Mindat Gallery and my page. The last image has already been uploaded to the Mindat Gallery (Dec.2009) and is already in my photo gallery on my page. Hope these help. The Ball's Hill specimen is a real old-timer from around 1900 with really good luster for the locality.
Steve.
avatar Re: Andradite N to Z
July 18, 2011 02:54PM
Steve,
I have put them in the article. Good specimens.

Rock Currier
Crystals not pistols.
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