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Michael Shaw
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Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 04, 2014 16:56 Post subject: Re: Collection of Michael Shaw |
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Sticking with the African theme - minerals from Madagascar, Mali, and Malawi.
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Arfvedsonite Mt. Malosa, Zomba District, Malawi 5.3 x 6.0 cm Prismatic, bladed, black arfvedsonite crystals on a partially decomposed feldspar matrix. |
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34165 Time(s) |
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Anorthite variety labradorite Antsohamamy Quarry, Ianapera, Benenitra Dist., Tulear Prov., Madagascar 4.0 x 4.9 cm A sample of labradorite that exhibits a bright blue schiller effect. |
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34259 Time(s) |
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Celestine Sakoany Deposit, Katsepy Commune, Boeny Region, Majunga Prov., Madagascar 6.5 x 8.0 cm Glassy transparent blue celestine crystals to 4.0 cm. |
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34116 Time(s) |
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Roger Warin
Joined: 23 Jan 2013
Posts: 1176
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Posted: Jan 04, 2014 17:06 Post subject: Re: Collection of Michael Shaw |
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Nice specimens.
Roger.
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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Posted: Jan 04, 2014 19:24 Post subject: Re: Collection of Michael Shaw |
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Each picture is like a work of art.
Don
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 04, 2014 22:20 Post subject: Re: Collection of Michael Shaw |
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Thank you Roger. And, Don, you are too kind.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 06, 2014 09:53 Post subject: Re: Collection of Michael Shaw |
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Minerals from Madagascar, Mali, and Malawi.
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Andradite var. demantoid Antetezambato, Antsirinana Province, Madagascar 3.6 x 6.4 cm Lustrous green crystals of andradite var. demantoid with dominant dodecahedron combined with trapezohedron faces. |
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33964 Time(s) |
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Prehnite Djouga diggings, Bendougou Village, Bafoulabe Circle, Kayes Region, Mali 3.9 x 4.2 cm Two intergrown spheres of lime green prehnite on a doubly-terminated crystal of blackish-green epidote. |
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33999 Time(s) |
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Aegirine Mt. Malosa, Zomba District, Malawi 0.6 x 7.5 cm A slender doubly-terminated crystal of black aegirine. |
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33981 Time(s) |
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Almandine Ialamitana pegmatite, Sahanivotry Commune, Antsirabé II Dist., Antananarivo, Madagascar 2.7 x 3.5 cm A sharp brown almandine trapezohedron with reddish highlights attached to a small piece of light-colored feldspar matrix. |
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33937 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 08, 2014 10:28 Post subject: Re: Collection of Michael Shaw |
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Continuing with Madagascar, Mali, and Malawi.
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Phlogopite Benato Phlogopite mines, Benato-Toby Commune, Betroka District, Anosy Region, Tuléar Province, Madagascar 4.5 x 5.4 cm A thick pseudohexagonal phlogopite crystal. |
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33882 Time(s) |
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Parisite Mt. Malosa, Zomba District, Malawi 3.3 x 4.1 cm A parisite crystal partially altered to limonite. |
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33842 Time(s) |
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Corundum var. ruby Zazafatsy Commune, Ihosy Dist., Fianarantsoa Province, Madagascar 3.9 x 4.3 cm A hexagonal bi-colored corundum crystal showing reddish and purple tones, surrounded by white feldspar and embedded in a black biotite schist. |
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33844 Time(s) |
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Grossular Dionboko, Kayes Region, Mali 3.3 x 3.5 cm An intergrown group of lustrous cinnamon-brown dodecahedral grossular crystals. |
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33853 Time(s) |
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Quartz Iovitra Mine, Itrema, Fianarantsoa Province, Madagascar 1.8 x 5.2 cm A single crystal of translucent to transparent quartz that exhibits a sharp mint green fuchsite-coated phantom just below the termination. |
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33882 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 12, 2014 11:38 Post subject: Re: Collection of Michael Shaw |
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A while back I posted a few of our specimens from Tsumeb, then moved on to another country before finishing the other locations in Namibia. So, the next few posts will finish up some of the other notable Namibian locations.
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Fluorite Okarusu Mine, Otjiwarongo District, Namibia 4.0 x 5.7 cm Cubic fluorite crystals with green cores and purple overtones to 2.5 cm on edge. |
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33761 Time(s) |
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Hemimorphite Skorpion Mine, Rosh Pinah, Karas Region, Namibia 3.8 x 5.9 cm Finely crystallized sheaves and fanlike forms of pale green hemimorphite pseudomorphing tarbuttite and overcoating a thin gray-blue layer of apatite. |
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33768 Time(s) |
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Descloizite Berg Aukas, Grootfontein District, Namibia 6.6 x 7.6 cm Dark brown spear-shaped descloizite crystals covering a shard of brecciated matrix. |
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33763 Time(s) |
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Descloizite Berg Aukas, Grootfontein District, Namibia 2.8 x 4.9 cm Stacked group of chocolate brown spear-shaped descloizite crystals. |
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33735 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 14, 2014 15:32 Post subject: Re: Collection of Michael Shaw |
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Continuing with Namibia, excluding Tsumeb.
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Copper Onganja Mine, Seeis, Windhoek District, Namibia 4.0 x 7.2 cm A branching group of elongated dodecahedrons, lightly coated with cuprite and minor malachite. |
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33686 Time(s) |
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Prehnite Goboboseb Mts., Brandberg area, Erongo Region, Namibia 5.5 x 7.1 cm Two mint green spheres of prehnite implanted on a calcite and quartz matrix. |
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33673 Time(s) |
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Quartz Goboboseb Mts. Brandberg area, Erongo Region, Namibia 3.6 x 4.5 cm Several intergrown quartz crystals with amethystine and smoky zones as well as gas/fluid inclusions. |
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33740 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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Posted: Jan 14, 2014 16:07 Post subject: Re: Collection of Michael Shaw |
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Michael, I really like your copper crystals from Namibia.
Don
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Roger Warin
Joined: 23 Jan 2013
Posts: 1176
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Posted: Jan 14, 2014 16:29 Post subject: Re: Collection of Michael Shaw |
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I like descloizite.
Roger.
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 15, 2014 11:20 Post subject: Re: Collection of Michael Shaw |
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Thanks for your kind comments Don and Roger. Today's post features specimens from the Erongo Region.
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Foitite Erongo Mts., Erongo Region, Namibia 1.6 x 5.5 cm. Lustrous black parallel growth clusters of columnar foitite with a light preferential druse of pale gray silica. |
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33676 Time(s) |
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Schorl Erongo Mountain, Erongo Region, Namibia 4.0 x 4.3 cm Equant doubly-terminated lustrous black schorl crystal. |
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33627 Time(s) |
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Beryl var. aquamarine Bersig Farm 167, Omaruru Dist., Erongo region, Namibia 2.1 x 2.7 cm A hexagonal prism of aquamarine with a pinacoid termination and minor schorl in association. |
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33653 Time(s) |
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Schorl Bersig Farm 167, Omaruru Dist., Erongo region, Namibia 3.5 x 6.0 cm A stout black schorl crystal with small pieces of weathered feldspar and a small aquamarine attached to the top termination. The bottom termination is partially etched leaving a raised trigonal termination. |
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33652 Time(s) |
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Roger Warin
Joined: 23 Jan 2013
Posts: 1176
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Posted: Jan 15, 2014 12:01 Post subject: Re: Collection of Michael Shaw |
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Hello Michael,
The illusion is complete. Foitite looks like a tourmaline 16 cm high.
Fine specimen, excellent photo.
Roger.
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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Posted: Jan 15, 2014 12:39 Post subject: Re: Collection of Michael Shaw |
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Michael, in my very limited experience I know that Foitite and Schorl are very difficult to photograph. Your pictures are superb.
Don
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 17, 2014 11:01 Post subject: Re: Collection of Michael Shaw |
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Glad you enjoyed the last post Roger and Don. Today's post will finish up the Erongo region.
Michael
Description: |
Fluorite on smoky quartz Erongo Mts., Erongo Region, Namibia 2.6 x 4.9 cm Cube-octahedral green fluorite crystals partially surrounding the base of two smoky quartz crystals in parallel growth. |
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33424 Time(s) |
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Schorl Erongo Mts., Erongo Region, Namibia 4.6 x 8.0 cm An intergrown group of black schorl crystals with several small quartz crystals and a 0.5 cm cubic green fluorite crystal. |
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33489 Time(s) |
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Fluorite Erongo Mts., Erongo Region, Namibia 2.5 x 3.1 cm Deep green fluorite crystal with a purple phantom showing cubic {100} and octahedral {111} faces on a matrix of golden muscovite. |
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33457 Time(s) |
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Beryl var. goshenite Erongo Mts., Erongo Region, Namibia 3.5 x 4.0 cm Two lustrous hexagonal goshenite crystals with pinacoid terminations nestled among several intergrown schorl crystals. |
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33437 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 20, 2014 19:09 Post subject: Re: Collection of Michael Shaw |
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A few from Tanzania.
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Prehnite Merelani Mines, Lelatema Mts., Manyara Region, Tanzania 4.6 x 5.7 cm An intergrown group of randomly oriented pale blue prehnite crystals. |
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33270 Time(s) |
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Diopside Samax Mine, Merelani Hills, Manyara Region, Tanzania 1.4 x 2.9 cm A doubly terminated lime green diopside crystal with a tiny speck of graphite. |
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33314 Time(s) |
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Zoisite var. tanzanite D Block, Merelani Mines, Lelatema Mts., Manyara Region, Tanzania 1.5 x 1.9 cm Deep blue tanzanite crystals in parallel growth. |
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33362 Time(s) |
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Mike Wood
Joined: 16 Dec 2010
Posts: 456
Location: Northern England
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Posted: Jan 21, 2014 13:15 Post subject: Re: Collection of Michael Shaw |
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Very pleasing mineral specimens and photo's Michael. Don't think I've seen blue prehnite before. Thanks again.
Mike
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 21, 2014 16:18 Post subject: Re: Collection of Michael Shaw |
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Mike Wood wrote: | Very pleasing mineral specimens and photo's Michael. Don't think I've seen blue prehnite before. Thanks again.
Mike |
Thank you Mike. I had never seen blue prehnite either. These were found in summer 2013. I would like to know what agent causes the blue color.
Michael
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 24, 2014 10:50 Post subject: Re: Collection of Michael Shaw |
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Here are a few odds and ends before I start the Congo.
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Gypsum El Goléa, Ghardaïa Province, Algeria 7.0 x 9.5 cm An aggregate of reddish-brown lenticular gypsum crystals with sand inclusions. |
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33202 Time(s) |
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Hopeite Kabwe Mine, Kabwe, Kabwe District, Central Province, Zambia 7.5 x 12.0 cm Prismatic reddish-brown crystals of hopeite on a breccia fragment of limestone. |
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33111 Time(s) |
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Hopeite Kabwe Mine, Kabwe, Kabwe District, Central Province, Zambia FOV = 3.0 cm Closeup of above specimen. |
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33127 Time(s) |
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Hematite ps. after marcasite Farafra Oasis, White Desert, Matru Governorate, Egypt 4.1 x 4.6 cm Radiating chocolate brown spikes of hematite replacing marcasite crystals |
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33222 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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Posted: Jan 24, 2014 13:23 Post subject: Re: Collection of Michael Shaw |
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I like your tanzanite and hematite ps after marcasite, Michael.
Beautiful specimens and photography.
Don
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2069
Location: Oklahoma
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Posted: Jan 25, 2014 17:15 Post subject: Re: Collection of Michael Shaw |
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Don Lum wrote: | I like your tanzanite and hematite ps after marcasite, Michael.
Beautiful specimens and photography.
Don |
Thank you Don. I really appreciate your comments.
Michael
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