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Joseph DOliveira
Joined: 29 Jan 2012
Posts: 306
Location: Hanmer, Ontario
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Posted: Feb 21, 2014 22:25 Post subject: Re: Bob's rocks |
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Beautiful specimen of Helvite, one of the best I've seen.
_________________ Joseph D'Oliveira
Hanmer, Ontario
Canada |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Feb 21, 2014 22:36 Post subject: Re: Bob's rocks |
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Thanks. I had been looking for a good Quartz/Scheelite combo and found it in my favorite Chinese dealer's room. The helvite came out at the end of last year and is one of the biggest ones my source has ever seen.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Feb 22, 2014 12:19 Post subject: Re: Bob's rocks |
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Prior to this Tucson, I had only one Colorado Amazonite in my personal collection. My Master's thesis was done on an Amazonite-bearing granite in California, and I have always like them, so this year I decided to get a couple....
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Microcline ( var. Amazonite ) with Quartz (v. Smoky) and Hematite Blue Marble Pocket, Smoky Hawk Mine, Buckner Pegmatite, Florissant, Teller Co., Colorado, USA
87 x 82 x 82 mm overall
A pair of dark smoky Quartz crystals to 53 x 25 mm are perched on blocky blue-green Amazonite to 35 x 27 mm with sharp, white stripes. Hematite pseudomorphs are perched on the Quartz points. From Joe Dorris' claim. |
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23106 Time(s) |
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Microcline ( var. Amazonite ) with Albite Confetti Pocket, Smoky Hawk Mine, Buckner Pegmatite, Florissant, Teller Co., Colorado, USA
143 x 107 x 70 mm overall
Largest crystal is 70 mm long. |
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23193 Time(s) |
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Fluorite on Microcline (v. Amazonite) Confetti Pocket, Smoky Hawk Mine, Buckner Pegmatite, Florissant, Teller Co., Colorado, USA
79 x 52 x 35 mm overall
A cluster of Fluorite crystals to 18 mm is perched on rich-blue-green, tabular Amazonite crystals to 25 x 23 mm. This is one of two pieces found in the pocket, and is the best of the two. |
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23074 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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Posted: Feb 22, 2014 13:11 Post subject: Re: Bob's rocks |
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You have good taste Bob. Thank you for showing us your treasures.
_________________ Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Joseph DOliveira
Joined: 29 Jan 2012
Posts: 306
Location: Hanmer, Ontario
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Posted: Feb 22, 2014 13:16 Post subject: Re: Bob's rocks |
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It is often argued that the Lake George Amazonite generally has better colour than the Amazonite from Florissant. I would think that the two specimens above would challenge that argument, two very beautiful Amazonite specimens.
_________________ Joseph D'Oliveira
Hanmer, Ontario
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Feb 22, 2014 14:29 Post subject: Re: Bob's rocks |
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Wonderful amazonites, especially that 14 cm killer specimen!!!
Tobi
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Mar 20, 2014 23:36 Post subject: Re: Bob's rocks |
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A few quartz specimens...
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Quartz L'Alpe d'Huez, Bourg d'Oisans, Isère, Rhone-Alpes Region, France 150 x 92 x 62 mm
Gemmy Quartz crystals to 54 x 20 mm, with a slightly satiny luster, are perched on a base of green Chlorite(?)-included Quartz. |
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22756 Time(s) |
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Quartz ( var. Chlorite Included ) with Albite Ganesh Himal, Dhading District, Bagmati Zone (Anchal), Nepal 74 x 55 x 52 mm
Crystals to 45 mm in length |
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22679 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Mar 21, 2014 22:01 Post subject: Bob's rocks - Inner Mongolia |
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A few from Inner Mongolia -- including a rare Pyrite.
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Calcite
Huanggangliang Fe mine, Kèshíkèténg Qí, Chifeng Prefecture, Inner Mongolia A.R., China 107 x 94 x 80 mm
Pink rhombs of Calcite to 54 mm perched on matrix covered with flat plates of white Calcite. |
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22666 Time(s) |
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Pyrite on Calcite
Huanggangliang Fe mine, Kèshíkèténg Qí, Chifeng Prefecture, Inner Mongolia A.R., China 107 x 84 x 46 mm
A pair of irridescent Pyrites to 60 x 45 mm, composed of many small pyritohedral faces, are perched on blades of white Calcite, intergrown with other smaller Pyrites. Some trivial damage to a few Calcites, and the Pyrites are in pristine condition. |
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22609 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2868
Location: Arkansas
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Posted: Mar 21, 2014 22:23 Post subject: Re: Bob's rocks |
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Bob, I like your pyrite on calcite. Both beautiful and interesting.
Don
_________________ hogwild |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Mar 21, 2014 23:13 Post subject: Re: Bob's rocks |
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Thanks Don.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Mar 24, 2014 22:52 Post subject: Bob's rocks - Japan Orthoclase |
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Japan...
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Orthoclase with Muscovite and Cleavlandite
Tawara, Hirukawa, Nakatsugawa City, Gifu Prefecture, Honshu, Japan 92 x 82 x 56 mm
Baveno-twinned Orthoclase measuring 90 x 25 x 24 mm, accompanied by a book of silvery Muscovite to 27 mm across and accented with a cluster of white blades of Albite (v. Cleavelandite). |
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22294 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 22, 2014 23:30 Post subject: Bob's rocks - Pederneira Elbaite |
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Several lustrous green Elbaites with pink cores are perched on translucent blades of Albite (v. Cleavlandite). These classic "watermelon" tourmalines measure to 31 x 12 x 11 mm in size. All the terminations are textures with many small dimples. In near perfect condition with only one clean repair, this is a really showy specimen from the Pederneira claim. It is likely from the 1970s, and is ex. Dan Velasco collection.
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Elbaite with Albite Pederneira claim, São José da Safira, Doce valley, Minas Gerais, Brazil 68 x 52 x 40 mm |
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21955 Time(s) |
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Elbaite with Albite Pederneira claim, São José da Safira, Doce valley, Minas Gerais, Brazil 68 x 52 x 40 mm |
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21948 Time(s) |
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Enrique Llorens
Joined: 02 Jun 2011
Posts: 390
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Posted: Apr 23, 2014 10:36 Post subject: Re: Bob's rocks |
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Good minerals, and great aesthetic taste.
Congratulations.
Enrique Llorens.
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Don Lum
Joined: 03 Sep 2012
Posts: 2868
Location: Arkansas
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Posted: Apr 23, 2014 13:19 Post subject: Re: Bob's rocks |
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Beautiful elbaite specimen, Bob.
Don
_________________ hogwild |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 23, 2014 13:51 Post subject: Re: Bob's rocks |
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Thanks! Unlike most of my tourmalines, I was able to photograph it ok.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 23, 2014 18:14 Post subject: Bob's rocks - Elbaite from Barra do Salinas |
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A lustrous, striated, rich pine-green Elbaite measuring 53 x 28 x 22 mm is perched on flattened, translucent Quartz crystals to 65 x 53 x 35 mm. The termination is perfect. It is an extremely beautiful and attractive specimen circa 1970s from the Dan Velasco collection.
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Elbaite on Quartz Barra do Salinas, Araçuaí Pegmatite District, Coronel Murta, Minas Gerais, Brazil 90 x 88 x 71 mm different lighting |
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21815 Time(s) |
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Elbaite on Quartz Barra do Salinas, Araçuaí Pegmatite District, Coronel Murta, Minas Gerais, Brazil 90 x 88 x 71 mm |
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21810 Time(s) |
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Elbaite on Quartz Barra do Salinas, Araçuaí Pegmatite District, Coronel Murta, Minas Gerais, Brazil 90 x 88 x 71 mm |
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21826 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 23, 2014 18:19 Post subject: Bob's rocks - Calcite and Copper |
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A large, gemmy, clear Calcite measuring 66 x 56 x 29 mm is perched on a matrix covered with smaller colorless to pink Calcite crystals and native Copper. Thin blades of Copper to 25 mm lie on the matrix and some are partly included in the large Calcite. ex. Dr. David Roter collection.
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Calcite and Copper Quincy Mine, Pewabic Amygdaloid Lodes, Houghton County, Michigan, USA 114 x 82 x 75 mm |
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21841 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 24, 2014 23:41 Post subject: Bob's rocks - Titanite Austria |
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This cabinet plate features Titanite (Sphene) crystals with Adularia and needles of Tourmalines. The green Titanite crystals to 8 mm, and are all terminated and glassy. The Adularia crystals are also quite glassy and many are also doubly terminated. A fine Chlorite dusting accents the specimen and the Tourmaline needles are included within many of the Sphenes. This is ex. Keith Proctor, Marvin Rausch Mineral Collections.
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Titanite on Adularia with Tourmaline Zillertal, North Tirol, Tirol, Austria 160 x 112 x 84 mm |
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21660 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Apr 26, 2014 10:43 Post subject: Bob's rocks - Ferberite China |
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An exceptionally good Chinese Ferberite with bladed crystals to 72 x 55 x 6 mm all perched on clear to translucent white Quartz points to 55 x 15 mm. What makes this specimen unique is that it comes from a locality which produced relatively few fine specimens, namely the Piaotang Mine. It is in perfect condition and is ex. Dr. David Roter collection.
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Ferberite and Quartz Piaotang Mine, Xihuashan Ore Field, Dayu Co., Ganzhou Prefecture, Jiangxi Province, China 135 x 103 x 101 mm |
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21399 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1474
Location: Catalonia
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Posted: Apr 26, 2014 15:40 Post subject: Re: Bob's rocks - Ferberite China |
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GneissWare wrote: | An exceptionally good Chinese Ferberite... |
Really superb, Bob!
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