December 2014 Update

 

OKL-428

OKL-428      Cerussite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A single crystal measuring 5.3 x 4 x 4.5 cm.  Minor magnesite matrix with white accessory crystals of ??  The crystal is very transparent, moderately reticulated, and has zero damage.  Base contact only so it displays equally well from any direction.  This is a fantastic miniature that ranks among the best cerussites from anywhere in the world that could be found from any location.  Most dealers would have this out there at a far greater price given the quality.  A magnificent miniature sized specimen.  The highest of quality.  $850

 

 

 

 

 

 

OKL-430

OKL-430     Cobaltoan Smithsonite on Tennantite        Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This specimen hosts a big single pink smithsonite as well as several smaller ones.  The big one is deep pink and measures 2.3 x 1.6 x 1.4 cm overall an rests on a tennantite  matrix of 4.5 x 4.5 x 2.4 cm.  The big crystal is damage free with contacts on edges of the piece.  Slightly rounded form to the crystals as is typical and the same recognizable luster which I’d describe as somewhat pearly.  $1,300

 

 

 

 

 

OKL-431

OKL-431      Cerussite on Mottramite, Calcite and Duftite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  An attractive assemblage with light and dark greens intermixed on mostly white crystals.  The white could be smithsonite being intermixed with what is definitely calcite makes it difficult to tell.  The specimen is 9.7 x 7 x 4.3 cm and the cerussites are to 1.2 cm and gemmy.  Entirely crystallized front, back, and every side with only a couple back side contacts.  No damage on front and only a chipped cerussite on the back.  Very clean.  $325

 

 

 

 

 

 

OKL-447

OKL-447      Mottramite and Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A 7 x 4.3 x 4 cm specimen with clear calcites heavily included and coated by mottramite.  The calcites are in well-formed rhoms in excess of 2 cm each.  The medium green mottramite is in blooms and stalactitic (pseudomorphs after?) like columns all over the specimen.  It looks rough but the condition is actually very good with only a few scrapes being present, even when closely inspected with magnification.  Fully crystallized on every side.  Displays great from any direction.  $300

 

 

 

 

 

 

 

 

OKL-448       Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  An absolutely beautiful, water clear grouping of tabular calcites to 2.8 cm each forming this 6.8 x 6.8 x 3.5 cm cluster.  It is on a dark matrix and more three dimensional than it might appear in the photographs.  It is an exceptional calcite for Tsumeb.  Remember, the calcites were seldom collected by the miners who often felt they were worth too little to risk getting fired for.  Today specimens of this quality are very rare.  This one is of the highest quality with only a couple micro chips near the edges.  The edges are not even broken but composed of fully formed damage free crystals.  Simply outstanding.  Expensive for a calcite yet inexpensive for a rare Tsumeb calcite of this form and quality.  $400

 

 

 

 

 

 

OKL-449

OKL-449     Mimetite, Conicalcite, Dolomite, etc.       Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection. These minerals present themselves as a heavy druse on a very three dimensional piece of matrix.  The color contrasts are pleasant and there is no damage to the piece.  Views fine from any direction and sits on a flattened surface.  9.5 x 6.1 x 4.2 cm.    $375

 

 

 

 

 

 

OKL-452

OKL-452     Calcite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This specimen is one of the varieties exhibiting bladed crystals with stepped growth that most of us are very familiar with.  The crystals are large, to almost 4 cm each, and transparent to translucent 10 x 9.6 x 4.5 cm with a very light pink cast.  Only the very slightest of touch marks so the condition is very good, overall.  Strong edge contact along one side.  Nice example.  $250

 

 

 

 

 

 

OKL-453

OKL-453     Calcite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This specimen is one of the varieties exhibiting bladed crystals with stepped growth that most of us are very familiar with.  The crystals are large, to over 6 cm each, and transparent to translucent 11.5 x 9.5 x 6 cm.  Some minor cleaving as seen in the images.  Nice example.  $190

 

 

 

 

 

 

OKL-454

OKL-454     Tarnowitzite on Smithsonite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Creamy white, high luster crystals of this variety of aragonite line a seam exposed in a galena rich matrix.  The original matrix was coated by brown smithsonite crystals.  Some can be seen poking out along the edges of the piece but most are covered by the tarnowitzite crystals.  The tarnowitzites are to over a cm each and nicely formed.  8.4 x 5 x 3.7 cm.  No damage to crystallized areas.  $295

 

 

 

 

 

 

OKL-456

OKL-456     Dioptase and Smithsonite on Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A nice showy cabinet specimen measuring 8 x 6 x 3.2 cm.  The bright green dioptase crystal cover much of the display face.  They are small, lustrous, transparent and vibrant.  There is a druse of bright smithsonite crystals in areas. The white spot on the edge is only damaged spot and on first glance really looks like a coating… it is only with magnification that I could tell this was a damaged spot.  $600

 

 

 

 

 

OKL-457

Unknown mineral in acicular spray of crystals

OKL-457     Cerussite and Others    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  The nice twinned cerussite (2.3 cm in diameter) on tennantite is obvious but the other species…I just don’t know.  What looks like calcite appears not to be, the greenish bloom of acicular crystals at first glance appears to be smithsonite ( I don’t believe it is).  This will be a fun discovery process for someone.  9.3 x 8 x 5 cm.  The surface material in white is crystallized but very crude in form. The specimen looks to be damage free.  $390

 

 

 

 

 

 

Top down view

Back with smithsonite

Close up of smithsonite

OKL-458     Descloizite and Smithsonite    Berg Aukas, Grootfontein, Nambibia, Africa.  Ex. Thomas G. Fowler collection.  A substantial, high luster specimen measuring 6.4 x 3.7 x 3.5 cm overall with crystals to over 3.5 cm each.  Only a couple of small blades broken on what I would consider the back of the specimen.  The piece is a floater and views well all around.  The smithsonites are tiny tan colored rhombs, mostly along the base of each blade of descloizite.  The crystal in this cluster radiate in a slightly divergent manner and make for one fantastic example of this species.  Impressive for the species but throw in the smithsonite and you have something special.  Sits nicely, great display piece.  $1,950

 

December 2014, Page 2

 

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