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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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 Posted: Jul 08, 2012 18:01 Post subject: Re: Bob's rocks |
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Another Sweet Home piece -- Galena specimens are hard to get, particularly with the distinctive Rhodo that makes clear where it is from.
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Galena with Rhodochrosite and Quartz, with minor Sphalerite and Chalcopyrite
Sweet Home Mine, Alma District, Buckskin Gulch, Park County, Colorado, USA
163 x 95 x 42 mm
Gray Galena crystals to 8 mm, consisting of both octahedral and cuboctahedral habits are accented by brassy, iridescent Chalcopyrite to 4mm and lustrous black Sphalerite crystals to 7 mm. Clear needles of Quartz to 21 mm long and a single, transparent, cherry-red rhomb of Rhodochrosite measuring 9x6x6 mm provide accents. No damage. |
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29855 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Jul 13, 2012 22:56 Post subject: Re: Bob's rocks |
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Here are a few relatively new things from Inner Mongolia..
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Hedenbergite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
89.0 x 65.0 x 49.0 mm
Elongate, semi-lustrous, green tabular crystals of Hedenbergite are arranged in a semi-radiating structure, and are accented with white on the apical termination. Several clear and etched crystals of Calcite to 8 mm are perched on the Hedenbergite. A nice specimen from this prolific locality with no damage. |
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29712 Time(s) |
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Fluorite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
85.0 x 67.0 x 42.0 mm
Semi-lustrous, deep-purple Flourite completely covers all sides of this specimen, which consists of parallel and intergrown plates of Fluorite matrix. The Fluorite habits range from sharp, individual cubes to 5 mm, and complex clusters of crystals to 20 mm comprised of many, slightly rounded cubes. A patch of earthy, pale-purple botryoidal material provides an accent. No damage. |
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29722 Time(s) |
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Rhodonite with Tremolite
Chaobuleng Mine, Dongwu Qí, Xilinguole, Inner Mongolia A. R., China
130.0 x 68.0 x 58.0 mm
Lustrous, flattened blades of Rhodonite form a large subparallel, seemingly doubly-terminated group measuring 130 x 55 x 36 mm, accompanied by a similar perpendicular group that is cleaved on the base. The Rhodonite is mostly opaque and light-pink colored, with portions that are gemmy and cherry-red. Although there is some damage, it is masked by the ragged crystal terminations. |
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29694 Time(s) |
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Ilvaite with Quartz
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
127.0 x 100.0 x 63.0 mm
This bizarre-looking specimen consists of pale-green fibrous Hedenbergite coating a large dark Ilvaite crystal measuring 90 x 34 x 7 mm. The Ilvaite's flat termination is completely covered with slightly sceptered milky Quartz crystals oriented parallel to the Ilvaite's c-axis. A large, 75 x 15 mm, sceptered Quartz with a glassy cap is intergrown with a doubly-terminated Quartz, and these are accompanied by numerous other smaller sceptered Quartz. |
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29664 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Jul 13, 2012 23:01 Post subject: Re: Bob's rocks |
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A few more from Inner Mongolia....
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Quartz with Calcite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
105.0 x 105.0 x 67.0 mm
Lustrous, glassy, light-smoky Quartz crystals to 56 x 33 mm support a stack of thin, flattened, light-pink Calcite blades to 44 mm across. Several other minor stacks of similar light-pink Calcite, some partly cleaved, provide an accent. Minor chipping is visible with a 10x loupe on the termination of one of the Quartz, otherwise they are pristine. This is an excellent and unusual piece from this prolific Chinese locality. |
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29669 Time(s) |
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Quartz
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
92.0 x 69.0 x 60.0 mm
Highly lustrous, clear glassy Quartz crystals to 65 x 26 mm, some doubly terminated, are nearly completely covered with a second generation of 1 to 2 mm lustrous, glassy Quartz creating a very sparkly display. No damage. |
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29678 Time(s) |
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Andradite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
122.0 x 64.0 x 52.0 mm
Sharp, lustrous, dark-olive-green dodectahedral Andradite crystals to 12 mm are almost completely covered by a thin secondary growth of golden Andradite. Several white crystals of Calcite accent the specimen. Nearly pristine with some marginal chipping, and a few spots where the secondary growth is removed exposing the underlying Andradite. |
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29711 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5090
Location: Barcelona
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| Posted: Jul 14, 2012 11:37 Post subject: Re: Bob's rocks |
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According Berthold Ottens these Rhodonites are not from Huanggangliang area but from Chaobuleng Mine, Dongwu Qí, Xilinguole, Inner Mongolia A. R., China. As it is well known, Berthold is usually well informed... ;-) Do you want your caption modified?
BTW the brown material covering the Rhodonite is Tremolite, we analyzed it, so not doubts about this.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Jul 14, 2012 13:02 Post subject: Re: Bob's rocks |
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| Jordi Fabre wrote: |
According Berthold Ottens these Rhodonites are not from Huanggangliang area but from Chaobuleng Mine, Dongwu Qí, Xilinguole, Inner Mongolia A. R., China. As it is well known, Berthold is usually well informed... ;-)
Do you want your caption modified?
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Shì de, Dàshī ! [ 是的，大师! ] -- Means "Yes, Master!"
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5090
Location: Barcelona
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| Posted: Jul 14, 2012 13:16 Post subject: Re: Bob's rocks |
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| GneissWare wrote: | | Shì de, Dàshī ! [ 是的，大师! ] -- Means "Yes, Master!" |
完成 (done ;-) ;-) ;-)
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quartzgreece
Joined: 10 Jul 2012
Posts: 6
Location: Thessaloniki-Greece
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| Posted: Jul 28, 2012 09:45 Post subject: Re: Bob's rocks |
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no comments !!!
perfect collection !
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Aug 18, 2012 01:10 Post subject: Re: Bob's rocks |
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Here are a few new ones from China...
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Scheelite and Quartz
Mt. Xuebaoding, Pingwu County, Mianyang Prefecture, Sichuan Province, China
62 x 58 x 48 mm
This well-balanced specimen hosts a lustrous, translucent yellowish-orange Scheelite crystal to 22 mm perched on a Muscovite matrix, and accompanied by a water-clear Quartz measuring 25 x 10 x 9 mm. Several other clear Quartz crystals and several light-cream-colored, translucent feldspar crystals to 7 mm provide additional interest. The edge of the Scheelite has several transparent Fluorite cubes intergrown along it. Only one very tiny chip is present on the Quartz termination. |
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32837 Time(s) |
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Calcite ( var. Manganoan )
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
87 x 50 x 48 mm
A beautiful "wheat sheave" cluster of lustrous, translucent, elongated, pink manganoan Calcite crystals measuring 41 x 34 mm is perched on a matrix of creamy Dolomite(?). It is complemented by a modified cube of opaque, pale pink manganoan Calcite, measuring 22 x 20 mm. A slightly sceptered Quartz crystal to 16 mm and minor sulphide crystals provide a nice accent. No damage. |
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32786 Time(s) |
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Genthelvite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
57 x 44 x 32 mm
Lustrous, brown Genthelvite crystals to 13 mm are perched on a matrix of black sulphide liberally covered with green needle Quartz crystals to 10 mm. Small lustrous Arsenopyrite crystals provide a nice accent. No damage. |
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32795 Time(s) |
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Fluorite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
85 x 68 x 30 mm
Numerous, water-clear crystals of Fluorite to 26 mm are perched on a matrix of lustrous, white Dolomite crystals. The Fluorites generally have complexly crystallized faces, although some faces are clear windowpanes. I can find no point of attachment, and the reverse consists of crystals of Dolomite and Fluorite. No damage. |
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32806 Time(s) |
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Loellingite with Fluorite and Arsenopyrite
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
116 x 94 x 68 mm
Spear shaped, lustrous, silvery crystals of Loellingite to 24 mm in length host numerous complex, glassy and gemmy, colorless Fluorite crystals to 37mm. Green Quartz crystals provide a nice accent. Several 2 mm chisel-shaped, lustrous crystals are perched on the Loellingite. No damage. |
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32827 Time(s) |
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Quartz
Huanggangliang Iron Mine, Kèshíkèténg Qí, Chifeng, Inner Mongolia A.R., China
101 x 82 x 76 mm
This is an excellent specimen with intergrown crystals of sceptered Quartz to 67 mm long, with well developed, dipyramidal heads. The Quartz are translucent, and have sharp faces and edges, and the caps of many are preferentially frosted. Small dipyramidal Quartz have grown on the the shafts of the Quartz. Minor Arsenopyrite crystals accent the specimen. Only very minor chipping is present on a few of the Quartz. |
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32771 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1538
Location: Catalonia
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| Posted: Aug 18, 2012 03:43 Post subject: Re: Bob's rocks |
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| Good Chinese specimens, Bob. My favorites are the genthelvite and the scheelite with quartz from Xuebaoding.
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4251
Location: Germany
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Aug 18, 2012 19:55 Post subject: Re: Bob's rocks |
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Hey Tobi,
I really like these combos from Xuebaoding, and this is the first I've seen with the gemmy little feldspars. I wish the Scheelite was a bit oranger, but I also really like it. Too bad this locality is not producing much at present.
Bob
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Aug 18, 2012 19:58 Post subject: Re: Bob's rocks |
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| Carles Millan wrote: | | Good Chinese specimens, Bob. My favorites are the genthelvite and the scheelite with quartz from Xuebaoding. |
Thanks Carles! I like the Scheelite also. Of the Huanggangliang pieces, my favorite are the Calcite (these are rare on matrix and this has 2 distinct habits), and the Lollingite/Fluorite combo. It is much better than the photos.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Sep 02, 2012 20:00 Post subject: Re: Bob's rocks |
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A Fluorapatite (or is now Apatite-F)? from the Sapo Mine, circa 2009...
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Fluorapatite on Albite
Sapo Mine, Doce valley, Conselheiro Pena, Minas Gerais, Brazil
51.0 x 42.0 x 42.0 mm
A sharp, glassy, lustrous dark-forest-green Apatite crystal, measuring 39 x 28 x 17 mm, with slightly beveled edges is perched on a bed of white glassy Albite cystals. The Albite is sprinkled with green microcystals of Apatite and accented by several well formed green Apatite crystals. The face of the large Apatite has a series of solution pits adding to the interest. This is an outstanding specimen with no damage. |
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32553 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Sep 02, 2012 20:18 Post subject: Bob's rocks -- Minerals from Japan |
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I thought I'd post a few things from Japan...
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Orthoclase
Takayama, Gifu Prefecture, Honshu, Japan
63.0 x 52.0 x 45.0 mm
Excellent, sharp pinkish-tan Baveno twin of Orthoclase, measuring 63 x 39 x 38 mm, is accented by white blades of Albite (v. Cleavlandite) and minor Muscovite. The Takayama area was well known for these twins. From the Earl Calvert (1904-1964) collection, this specimen is pristine. |
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32605 Time(s) |
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Stibnite
Ichinokawa Mine, Saijo, Ehime Prefecture, Shikoku, Japan
87.0 x 14.0 x 12.0 mm
This single, sharp 87 mm Stibnite crystal has well-developed parallel striations and a steep pyramidal termination. The other termination is ragged. As typical of specimens from this classic Japanese locality, there are a few minor nicks, but overall the Stibnite is in very good condition. This is from the notable collection of California collector Earl Calvert (1904-1964). |
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32489 Time(s) |
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Axinite-(Fe)
Obira Mine, Ono-gun, Oita Prefecture, Kyushu, Japan
60.0 x 52.0 x 43.0 mm
This fine, sculptural specimen from this famous Japanese locality consists of many sharply-terminated, lustrous, clove-brown crystals of Axinite to 21 mm. From the Earl Calvert (1904-1964) collection, this specimen is pristine. |
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32537 Time(s) |
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Quartz
Otome mining district, Miyamoto, Yamanashi Prefecture, Honshu, Japan
51.0 x 48.0 x 14.0 mm
This excellent example of Japan-law twinned Quartz is from the Otome mining district which produced the specimens where this twinning was first described. This is a very transparent crystal measuring 51 x 48 x 14 mm, and has high glassy luster and well-developed striations. Only minor chipping. It is from the notable collections of Northland College (Ashland, Wisconsin), John Barlow and Gene la Berge. |
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32477 Time(s) |
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Schorl
Ishikawa District, Fukushima Prefecture, Honshu, Japan
41.0 x 23.0 x 21.0 mm
This historic Japanese Schorl crystal measures 41 x 23 x 21 mm, and has sharp faces, a great luster, and well-developed parallel striations. With only minor chipping, this is a great specimen from the Collman collection, which was donated around 1920 to Northland College (Ashland, Wisconsin). |
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32502 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Sep 02, 2012 20:30 Post subject: Bob's rocks - Minerals from Japan (Part 2) |
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A few more from Japan...
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Calcite
Kushikino Mine, Kagoshima Prefecture, Japan
41.0 x 26.0 x 15.0 mm
Superb butterfly twin of Calcite measuring 41 x 19 x 11 mm perched on a shard of limonite-coated matrix from the Kushikino Mine, a closed gold-silver mine famous to Japanese collectors for these twins. No damage. |
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32458 Time(s) |
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Henmilite
Fuka Mine, Bitchu-Cho, near Takahashi, Kawakama Co., Okayama Prefecture, Honshu, Japan
57.0 x 52.0 x 40.0 mm
Lustrous, rich royal-blue, euhedral, triclinic pinacoidal Henmilite crystals to 5 mm are nestled in contrasting matrix of botryoidal white Calcite from the type locality for Henmilite. These specimens were found in 2004, and collecting thereafter is prohibited. No damage. |
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32452 Time(s) |
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Henmilite and Olshanskyite
Fuka Mine, Bitchu-Cho, near Takahashi, Kawakama Co., Okayama Prefecture,
Honshu, Japan
42.0 x 35.0 x 34.0 mm
Numerous lustrous, rich royal-blue Henmilite crystals to 4 mm are perched on contrasting matrix of botryoidal white Calcite with small patches of clear Olshanskyite, from the type locality for both Henmilite and Olshanskyite. The Henmilite are euhedral, triclinic pinacoidal crystals. Pale blue bands of an unknown mineral are present in the Calcite. These specimens were found in 2004, and collecting thereafter is prohibited. No damage. |
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32524 Time(s) |
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Quartz
Otome mining district, Miyamoto, Yamanashi Prefecture, Honshu, Japan
80.0 x 62.0 x 27.0 mm
This very large Quartz is from the late 1800s to early 1900s, when the original Japanese Quartz specimens were produced, from which Japan law twinning was initially described. This is an old classic. It is damaged on both on the lower-left side, on and just past the prismatic associate crystal's termination; and has a slight cleave on the back of the other termination (not seen from front). Still, this is a superbly aesthetic, dramatic piece from Japan with great provenance. Formerly in the Richard Hauck collection, the old Frederick Canfield label dates this to 1914, though it probably came to him in an older collection. Old Canfield labels are rare, as he bequeathed his entire mineral collection, plus a $50,000 endowment for its support and enlargement, to the Smithsonian Institution. Under conditions of the will, the Smithsonian may not disperse any of his specimens. |
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32487 Time(s) |
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Stibnite
Ichinokawa Mine, Saijo, Ehime Prefecture, Shikoku, Japan
99.0 x 69.0 x 44.0 mm
This is a complex group of parallel to sub-parallel crystals of Stibnite to 57 mm, forming a nice 3-dimensional specimen from this famous Japanese locality. The Stibnite is of classic form and gun-metal gray in color. Collected circa 1879, it was previously in the Harvard University collection, and a Trafford-Flynn specimen. No damage. |
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32488 Time(s) |
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