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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Aug 01, 2014 23:43 Post subject: Bob's rocks - Quartz and Hematite from Cleator Moor, England |
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This classic, old-time, very uncommon and showy combination specimen consists of lustrous, sharp Quartz crystals to 34 x 21 mm, many doubly-terminated, which are perched on botryoidal, black and rust-red Hematite "kidney ore". These classic-for-this-locality Quartz crystals are diamond-shaped, dipyramidal, and without prism sides (often incorrectly referred to as beta-Quartz). Bright, sparkly-black specular Hematite covers a portion of the specimen. Specular Hematite and "kidney ore" combination specimens from the old iron mines at Cleator Moor are rather uncommon, and this is an outstanding example in great condition, with only one small chip on a Quartz near the margin. This is from the A.G. Boynton collection, circa 1910-1920. Boynton was a mining engineer and assembled a nice collection of rare specimens from the localities of that period.
Description: |
Quartz on Hematite Cleator Moor, West Cumberland Iron Field, Cumberland, Cumbria, England, United Kingdom 71 x 56 x 34 mm |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2094
Location: Oklahoma
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Posted: Aug 02, 2014 07:13 Post subject: Re: Bob's rocks |
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Beautiful piece Bob.
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Don Lum
Joined: 03 Sep 2012
Posts: 2869
Location: Arkansas
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Posted: Aug 02, 2014 09:31 Post subject: Re: Bob's rocks |
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I agree with Michael. Beautiful specimen and wonderful provenance, Bob.
Don
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Sep 18, 2014 23:21 Post subject: Bob's rocks |
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I picked these up over 10 years ago, and just found them in a box....Christmas comes early.
Mineral: | Rhodochrosite with Fluorite |
Locality: | Lamo-Longxianggai, Dachang District, Nandan, Hechi Prefecture, Guangxi Zhuang Autonomous Region, China | |
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Dimensions: | 43 x 41 x 38 mm |
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Several translucent, near cherry-red rhombs of Rhodochrosite to 16 x 12 x 11 mm, partly coated with small, white Calcite crystals, are accented with glassy, purple Fluorite cubes to 8 mm and small, brassy crystals of Chalcopyrite. This is a top-notch specimen, with near Sweet Home Mine color, and no damage. Found June 1999. |
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Mineral: | Azurite |
Locality: | Tsumeb Mine, Easter Pocket, Tsumeb, Otjikoto Region, Namibia | |
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Dimensions: | 84 x 72 x 28 mm |
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Several, intergrown, tablular Azurite crystals with great color and high luster form this floater specimen. The Azurite is accented with a light green coating. In excellent condition. From the Easter Pocket, 1st oxidation zone (8 level), it is ex. Georg Gebhard specimen. |
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Mineral: | Azurite |
Locality: | Red Dome Mine, Chillagoe, Chillagoe-Herberton District, Tablelands Region, Queensland, Australia | |
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Dimensions: | 67 x 40 x 33 mm |
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Well-crystallized Azurite crystals make up a vertical base capped by a large, sharp rhombohedral Azurite crystal, measuring 34 x 21 mm. The color ranges from bright blue to dark blue. Minor white Calcite? provides an accent. This is an exceptional piece with no damage. The Red Dome Mine produced sporadic bursts of Azurite and other carbonates during 1995-1996, and is now closed. It was a gold mine located 15 km WSW of Chillagoe. |
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23226 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2869
Location: Arkansas
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Posted: Sep 18, 2014 23:46 Post subject: Re: Bob's rocks |
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Three beautiful specimens, Bob. I especially like the rhodochrosite, fluorite from China. I hope you have a lot more boxes to go through like this one.
Don
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Sep 21, 2014 01:22 Post subject: Bob's rocks - Fluorite, Arsenopyrite from Huanggangliang |
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From a small late 2013 find
Mineral: | Fluorite with Quartz and Arsenopyrite |
Locality: | Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China | |
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Dimensions: | 120.0 x 92.0 x 45.0 mm |
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Sharp, teal-blue cuboctahedral Fluorites to 28 mm display with stark contrast on pure-white Quartz. In fact, the Fluorite have been exposed by selectively removing the Quartz coating. This Quartz matrix also reveals a lustrous, silvery Arsenopyrite to 25 mm across, hidden beneath. A close inspection reveals a grey, amorphous metallic coating atop the Arsenopyrite and beneath the Quartz, most likely Molybdenite. This is a top quality specimen from a small find at the end of 2013, and is in pristine condition. |
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Mineral: | Fluorite with Quartz and Arsenopyrite |
Locality: | Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China | |
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Dimensions: | 120.0 x 92.0 x 45.0 mm |
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23021 Time(s) |
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Mineral: | Fluorite with Quartz and Arsenopyrite |
Locality: | Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China | |
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Dimensions: | 120.0 x 92.0 x 45.0 mm |
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Closeup showing Arsenopyrite |
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23050 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Sep 21, 2014 04:21 Post subject: Re: Bob's rocks |
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That's exactly my kind of rock!!! :-)
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Sep 21, 2014 09:36 Post subject: Bob's rocks - Cassiterite from Xuebaoding |
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I have several of these, as I really like Xuebaiding, but this is much better than any of my other Cassiterites,,,
Mineral: | Cassiterite |
Locality: | Mount Xuebaoding, Pingwu, Mianyang Prefecture, Sichuan Province, China | |
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Dimensions: | 88.0 x 65.0 x 45.0 mm |
Description: |
A highly lustrous black Cassiterite twin measuring 50 x 45 x 27 mm is perched atop a matrix of Muscovite blades, to 22 mm across. This specimen is of top quality, and is in pristine condition. |
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Don Lum
Joined: 03 Sep 2012
Posts: 2869
Location: Arkansas
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Posted: Sep 21, 2014 10:20 Post subject: Re: Bob's rocks |
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Very nice Cassiterite, Bob.
Don
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Sep 25, 2014 23:06 Post subject: Bob's rocks - Tourmaline |
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A couple of circa 1970s tourmalines...
Mineral: | Elbaite on Quartz |
Locality: | Paprok, Kamdesh District, Nuristan Province, Afghanistan | |
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Dimensions: | 105.0 x 76.0 x 70.0 mm |
Description: |
A beautiful, well-terminated, bicolored, mostly light-green Elbaite, measuring 65 x 7 mm, with high luster, is partly intergrown with a sharp, clear Quartz point measuring 42 x 35 x 34 mm, all on blades of lustrous, white Albite (v. Cleavlandite). The large Elbaite has a pale-pink core and an intense, neon-green cap. It shows parallel stress fractures and minor chipping, but is unrepaired. Several other partly incomplete Elbaite crystals and a smaller Quartz point provide balance. The Quartz crystals display are sharp and clear with preferentially-frosted faces. This is a fine example from Paprok, from the Dan Velasco collection. |
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Mineral: | Elbaite on Quartz with Lepidolite |
Locality: | Araçuaí, Jequitinhonha, Minas Gerais, Brazil | |
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Dimensions: | 125.0 x 105.0 x 82.0 mm |
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A gemmy, light-cranberry, lustrous, well-terminated Elbaite crystal to 40 x 7 mm is nestled with a cluster of very-light-smoky Quartz comprised mostly of doubly-terminated crystals. The Quartz are slightly fronsted, with the largest measuring 73 x 50 x 35 mm. Light purple Lepidolite and white Albite hosts the Elbaite and Quartz creating a striking, contrasting matrix. Many small cranberry Elbaites are nested in and amongst the Quartz cluster. This is very showy specimen has no damage, and is ex. Dan Velasco collection. |
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Don Lum
Joined: 03 Sep 2012
Posts: 2869
Location: Arkansas
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Posted: Sep 25, 2014 23:45 Post subject: Re: Bob's rocks |
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Beautiful tourmalines, Bob. Thanks for posting.
_________________ hogwild |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2067
Location: USA
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Posted: Sep 26, 2014 00:34 Post subject: Re: Bob's rocks |
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Very nice elbaites. Especially the last specimen. Very aesthetic.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Dec 20, 2014 20:31 Post subject: Bob's rocks - Amazonite from California |
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Numerous, sharp, triclinic crystals of bluish-green Microcline (v. Amazonite) to 41 x 26 x 24 mm are nestled in a perthitic granite pocket. Several dark books of Muscovite to 18 mm across accent. In excellent condition, this is an outstanding specimen from this California locality which is known only for small specimens and crystals. Self-collected in January 1985.
Mineral: | Microcline (var. amazonite) and Muscovite |
Locality: | Kern Knob Pluton, Lone Pine, Inyo Mountains (Inyo Range), Inyo County, California, USA | |
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Dimensions: | 233 x 203 x 83 mm |
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Mineral: | Microcline (var. amazonite) and Muscovite |
Locality: | Kern Knob Pluton, Lone Pine, Inyo Mountains (Inyo Range), Inyo County, California, USA | |
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Dimensions: | 233 x 203 x 83 mm |
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Vitaliy
Joined: 30 Nov 2014
Posts: 52
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Posted: Dec 20, 2014 21:31 Post subject: Re: Bob's rocks |
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Nice piece you have there especially since it is self-collected. It's also similar to Colorado Amazonite's and not simply massive Perthite interlaid with microcline var amazonite.
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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Posted: Dec 21, 2014 03:05 Post subject: Re: Bob's rocks |
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Great amazonite, Bob! I didn't know that such specimens can be found in California, my first thought was Colorado or Ethiopia. And the size is impressive, what an awesome find!
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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Posted: Dec 22, 2014 10:05 Post subject: Re: Bob's rocks |
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Hi Bob. Nice specimens and, especially the last few photos, very nice pictures.
_________________ Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Dec 22, 2014 10:20 Post subject: Re: Bob's rocks |
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Pierre, Tobi and Vitaliy,
Thanks for the kind words.
BTW, I spent 10 years and about 80 days at Kern Knob (my Master's thesis project) and except for a few thumbnails and one miniature, this Amazonite is the best I was able to find.
Bob
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Dec 25, 2014 22:30 Post subject: Bob's rocks - Fluorites |
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Here are a few fluorites....
Mineral: | Fluorite |
Locality: | Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province, China | |
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Dimensions: | 130.0 x 80.0 x 40.0 mm |
Description: |
Several, individual, well-separated cubes of glassy, pale-green Fluorite to 33 x 32 x 24 mm, with pale frosted phantoms at their edges, are perched on contrasting dark matrix accented with small sparkling cubes of pale Fluorite. The specimen is in perfect condition. |
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Mineral: | Fluorite on Quartz |
Locality: | Ruyuan Fluorite Mine, Ruyuan, Shaoguan Prefecture, Guangdong Province, China | |
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Dimensions: | 123.0 x 115.0 x 37.0 mm |
Description: |
Lustrous, translucent, apple-green Fluorites to 40 x 35 mm are perched on a bed of fine white to clear, etched Quartz points. In perfect condition. |
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Mineral: | Fluorite on Quartz |
Locality: | Xiefang Mine, Ruijin, Ganzhou Prefecture, Jiangxi Province, China | |
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Dimensions: | 81.0 x 80.0 x 50.0 mm |
Description: |
A lustrous, complexly-crystallized, cuboctahedral crystal of apple-green Fluorite measuring 61 x 56 x 40 mm, with stepped faces, is perched on a matrix of lustrous, white Quartz points to 3 mm, with sugary Quartz overgrowths. This is a top specimen with no damage. |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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Posted: Dec 26, 2014 00:51 Post subject: Re: Bob's rocks |
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Wow Bob, the last 2 specimens are very similar to some Brandberg prehnites! Lovely specimens.
_________________ Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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Posted: Dec 26, 2014 12:32 Post subject: Re: Bob's rocks |
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Bob, that Xianghualing specimen is a killer, I really like it!
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