November 2014 Update

 

The Thomas G. Fowler Collection

 

Thomas Fowler, of Stamford Connecticut, was a mineral enthusiast, an avid outdoorsman throughout his lifetime (1943-2006), and the President of an internationally recognized design firm.  He was an active field collector of minerals and member of the Stamford Mineralogical Society during the 1960’s and 70’s.  His primary area of interest was in the minerals of South Africa of which he built a fine collection in both depth and breadth.  His Tsumeb suite numbered approximately 1,500 specimens, many of which are exemplary: dioptase, cerussite, and smithsonite are examples of

species of which he had many top pieces.

 

OKL-410

OKL-410    Dioptase      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A 6 x 4.3 x 2 cm specimen with liberal amounts of bright green dioptase coating approximately ½ of the display face of the piece.  The lighter green strips in the central regions are not damage, they are secondary growths of smaller dioptase crystals.  The two generations of crystals in the central region are damage free and there is only peripheral contacts from removal from the rock in the mine.  $550

 

 

 

 

 

 

 

OKL-411

OKL-411    Dioptase on Smithsonite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Nice gemmy, deep green dioptase on purplish white smithsonite druse.  5.7 x 4 x 3 cm overall with one side of the specimen being entirely coated and the other side having more spread out areas of crystal coverage.  Chipping is confined to the peripheral areas due to removal from rock with the interior sections being damage free.  Very nice and different from one side to the other.  $800

 

 

 

 

 

 

 

OKL-412

OKL-412    Dioptase on Smithsonite with Cerussite   Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  5.6 x 4.2 x 3.5 cm with crystals to over 1 cm each.  A well formed cerussite crystal can be found on the upper or side, of the backside of the specimen.  It is gemmy and damage free.  There are the usual edge contacts in places but the only damage is near the lower edge with one partially crushed area on a crystal and a chip on a crystal at top.  Overall, these are large gemmy crystals in great condition in a showy arrangement on smithsonite.  There are a few spots showing minor clusters of smithsonite crystals on the dioptase.  A great piece of this rare material.  $1,950

 

 

 

 

 

 

 

OKL-413

OKL-413    Dioptase     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This 5 x 3.9 x 2.5 cm pice has a single area coated by gemmy crystals to .4 cm each and others by dioptase druse on calcite.  There is only the slightest of wear… if it looks like there is more it is simply because the “druse” is a second generation of smaller crystals and when on the larger ones, it makes their surfaces look rough.  An excellent example for this price.   $200

 

 

 

 

 

 

OKL-414

OKL-414    Dioptase with Cerussite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This attractive specimen boasts dioptase crystals to 1.2 cm and a single cerussite to 1.8 cm.  The piece measures a respectable 6.8 x 4.7 x 3 cm.  The condition is great with only the large central crystal having a small chip on its backside that is barely noticeable, even with magnification.  Great, showy specimen.   $675

 

 

 

 

 

 

OKL-415

OKL-415    Dioptase on Calcite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This vug/ seam is filled by nice sized dioptase crystals and calcite.  It measures 5.4 x 3.6 x 3.1 cm overall and shows no damage.  The crystals, as with all these specimens, are vibrant, of the highest luster, and sharp.  $325

 

 

 

 

 

 

 

OKL-416

OKL-416    Dioptase and Smithsonite    Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This nice piece is fully covered by dioptase crystals on its display face.  It measures 5 x 3.4 x 3 cm.  I only see one crystal missing in the body of the specimen, even the edges are in decent shape.  Minor overgrowths of small white smithsonite crystals in tiny clusters.  Sits on edge nicely.  $495

 

 

 

 

 

 

OKL-417

OKL-417    Dioptase on Calcite with Duftite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  5.8 x 4 x 3.2 cm overall.  Large attractive crystals to well over a cm each in maximum dimensions on clear to white calcite included, in some instances, by light green duftite.  No damage.  Edge contact only on one side, and the specimen can sit on this, although it displays equally well in several different positions.  The duftite also forms surface coatings on the matrix in a couple areas.  Miniature sized specimens don’t get much better than this!   $1,400

 

 

 

 

 

 

OKL-418

OKL-418    Dioptase on Calcite Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  An attractive example with a bright coating of crystals on white calcite rhombs to 1.7 cm each.  6 x 4.2 x 3.5 cm.  I have looped this carefully and only find two miniscule crystals chipped so the condition is very good.  Most of the crystals are gemmy and all are well formed and of the highest luster.  Sit well.  Flashy specimen.     $475

 

 

 

 

 

 

 

OKL-419

OKL-419    Dioptase on Calcite with Duftite and Smithsonite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  An attractive piece of mixed colors measuring 6 x 4.2 x 3.2 cm.  Very asthetically layed out with nice contrasts of color between the light and deep greens on white.  Scattered amongst the crystals of dioptase are tiny clusters of white smithsonite crystals.  There is a patch of white calcite broken of in the central area of the piece, but still this should remain a desirable specimen.  A domical specimen which views great from any direction except back, which is just okay.  $600

 

 

 

 

 

 

 

OKL-420

OKL-420    Dioptase on Calcite with Duftite and Smithsonite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This damage free piece measures 6.6 x 4.5 x 3.1 cm overall.  It displays beautifully having lots of flash and visual complexity between the different species.  Good views of problem free coatings of super high luster crystals.  Excellent specimen.  $500

 

 

 

 

 

 

OKL-421

Top view

OKL-421    Dioptase on Smithsonite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Here is a real beauty!  A slightly domical piece with very different, yet almost equally displayable front and back.  The front shows dioptase on brown smithsonite druse.  A couple areas show very minor chipping. The back is flat with a heavy coating of dioptase.  Back shows a chipped area at top.  Other area is a coating of fibrous malachite or maybe brochaite.  Although there is a tiny amount of damage on each side the specimen is still of very high quality.  It measures in at 6.7 x 4.5 x 2.7 cm.  It sits on edge for display nicely.  Top view is excellent and side views are only okay showing contacts.  Nice!   $1,800

 

 

 

 

 

 

 

OKL-434

OKL-434      Cobaltoan Smithsonite on Galena      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A small specimen measuring 3.2 x 2.9 x 2.7 cm overall with coatings of smithsonite on several sides.  Light pink color to these crystals which stand up high off the etched galena crystals.  No damage.  $175

 

 

 

 

 

 

 

OKL-435

OKL-435      Smithsonite on Tennantite Stalactite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  An interesting piece with light pink smithsonite crystals on much of the surface of this branching stalactite of tennantite .  6 x 3.6 x 3 cm overall.  The smallest stalactite attachment is only partial, otherwise all surfaces are crystallized to some degree or healed.  No damage.  Interesting specimen.  $295

 

 

 

 

 

 

 

OKL-436

OKL-436      Smithsonite on Tennantite  Stalactite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A single partial stalactite with nice pink smithsonite heavily coating one side and partially on another.  4.3 x 2.3 x 2.2 cm.  Very back has damage from contact but all viewable surfaces (front, top, sides) are clean.  $300

 

 

 

 

 

 

 

OKL-437

OKL-437      Smithsonite and Quartz on Tennantite  Stalactite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A 5.1 x 3.1 x 2 cm grouping of stalactites with a partial coatings of nice pink smithsonites and clear quartz in single and double terminated crystals.  Everything other than base is crystallized and damage free.  Attractive example.   $550

 

 

 

 

 

 

 

 

OKL-439

OKL-439      Smithsonite with Cerussite and Tennantite       Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A fine miniature measuring 4.4 x 3.7 x 2.5 cm overall.  It is composed of large smithsonites (to 1.4 cm each) in a domical display that views well from almost any direction.  The one lone cerussite twin is chipped on its edge, being directly on the edge of the specimen where there was matrix contact.  It views fine except from that side.  Tennantite crystallizations gives it a dirtier look than most smithsonite specimens so the price reflects this.  $300

 

 

 

 

OKL-440

OKL-440      Dioptase on Smithsonite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Beautiful dioptase crystals widely scattered over the entire surface of matrix coated by white to tan colored smithsomite crystals.  5.8 x 3.8 x 1.7 cm with a slightly domical form..  Great condition with only a very tiny crystal showing damage.  Tough to even notice this.  Great example!   $375

 

 

 

 

 

 

OKL-442

OKL-442      Dioptase and Smithsonite on Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  Nice bright, transparent dioptase with tiny white smithsonite crystals on larger white calcites.  Very high luster and nice aesthetics to the piece which measures 3.7 x 3.1 x 2.2 cm overall.  The tiniest of Wilbers on one small dioptase crystal only visible with 10 x aid.  Domical form.  Displays great.  $260

 

 

 

 

 

 

 

 

OKL-444

OKL-444      Smithsonite on Dioptase on Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A fine miniature measuring 4.5 x 3 x 2.3 cm.  Very small clusters of tiny clear smithsonite crystal clusters sit amongst a heavy coating of small bright green dioptase.  This in turn rests on white calcite crystals.  No damage.  Sharp piece!  $225

 

 

 

 

 

 

OKL-445

OKL-445      Smithsonite on Dioptase with Duftite on Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A wonderful assemblage, all in damage free crystals.  4.8 x 4 x 3 cm overall.  Sits nicely several ways for display.  Excellent example.  $350

 

 

 

 

 

 

OKL-446

OKL-446     Dioptase with Duftite and Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  5.1 x 4 x 3.2 cm with crystals to .9 cm each.  Nice gemmy crystals spread out in an attractive manner on the matrix of this specimen.  The damage is to a couple of crystals isolated to one end as seen in the images.  Not overly distracting given the strong aesthetics of the entire piece.   A nice value at   $325

 

 

 

 

 

 

 

OKL-422

OKL-422       Wulfenite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This is an attractive, small plate of transparent to translucent crystals to .5 cm each.  It measures 4.2 x 3.2 x 1.5 cm and I only see one broken crystal in the lot.  Nice condition overall for this material.  Pleasant tan to gold color and high luster.     $150

 

 

 

 

 

 

 

 

OKL-423

OKL-423      Smithsonite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  This exceptional specimen is one of the finest specimens of this size that I have seen.  In hand it is impressive and seems larger than it really is.  It actually measures 7.2 x 5 x 2.4 cm with crystals to approximately .9 cm, most of which are in the half cm to .7 cm range.  The piece just fills your hand and is really something to behold.  I’m normally not that impressed by specimens that don’t have multiple species of contrasting forms and colors but this beautiful smithsonite is certainly the exception.  The color is vibrant!  It is a bold pink similar to a top cobalto calcite from Morocco.  The crystallization covers all sides except its base, which is in reality a single thin edge.  Here its manganite matrix shows through.  One side is more deeply coated than the other so the looks to each are slightly different.  Which side is the front???  All views are outstanding including the top and sides so you’ll have to decide how you like it best.  After long inspection with 10x I find one tiny chip on one crystal, on one side. If you can find it with your eye (I’d be surprised) and no aid by magnification I guess you’ll call that the backside.  I view this as near perfection as one can get.  For this level of quality the specimen is underpriced, so I do not anticipate having it long.   Comes with a custom engraved acrylic base.   $4,200

 

 

 

 

 

 

 

OKL-425

OKL-425     Calcite        Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  S dome of cream colored crystals to almost a cm maximum.  The piece is 5.6 x 4 x 2.4 cm overall..  Very minor pressure marks on a few calcites on back.  Sits well and views nicely from any direction.   $200

 

 

 

 

 

 

OKL-426

OKL-426      Mimetite with Mottramite, Manganite, Smithsonite and Dolomite?      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  There is quite the mix of minerals here on one side of this matrix piece.  It measures 6 x 4.5 x 3 cm and has thin, tapered, yellow mimetites to almost a cm each.  Both single and double terminated these crystals are jackstrawed about with the other species.  Minor breakage and contacts but still a respectable example of this material.  $250

 

 

 

 

 

 

 

OKL-427

OKL-427      Smithsonite and Calcite     Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A 6 x 4.6 x 2 cm piece composed of a druse coated matrix of light purple, white, and medium green smithsonite.  Very unusual thing to see these three colors all on one specimen!  Small clear to white calcite rhombs on one end, as well.  No damage less one missing calcite on end of piece.  $600

 

 

 

 

 

OKL-432

OKL-432      Mottramite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A nice miniature sized bloom of medium green mottramite measuring 4 x 2.7 x 1.9 cm.  There is contact and minor Styrofoam on the lower back otherwise fully formed and damage free on all surfaces.  Views great from any side or angle and its perfectly for display.  $180

 

 

 

 

 

OKL-433

OKL-433      Brochantite      Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia, South West Africa.  Ex. Thomas G. Fowler collection.  A 4.5 x 2.7 x 1.6 cm piece with liberal coatings of brochantite crystal of front and minor coverage on back.  A mix of other minerals are present.  $150

 

HOME           ORDERS