Pseudomorphs

Pseudomorphs such as this goethite after pyrite make interesting mineral specimens for collectors.    Pseudomorphs make interesting mineral specimens for collectors.    We are aware that some of you out there must be specializing in the unusual mineral replacements called pseudomorphs.  Weather they are encrustations, full or partial replacements we will put them here for your consideration.  We believe our selection holds interesting and attractive pseudos for all levels of collectors.  Some are self collected while others come from collections we have purchased.

 

OKB-592

OKB-592    Goethite after Pyrite  New Holland, Lancaster Co., PA.  Ex. Dr. Steve Chamberlain Collection.  Acquired from William Pinch Collection.  Superb pyritohedron from a classic site.  Nice pedigree.  Shows striations clearly.  130$

 

 

 

 

 

OKB-584

OKB-584    Goethite after Pyrite  Chestnut Hill, Lancaster Co., PA.  Ex. Dr. Steve Chamberlain Collection.  Excellent grouping of cubes to 2 cm on edge in a very fine grained matrix of schist.  Matrix specimens from this classic locations are rather uncommon.  65$

 

 

 

 

 

OKB-595

OKB-595    Goethite after Pyrite  Ironton., PA.  Ex. Dr. Steve Chamberlain Collection.  Prev. Frank Hess # 2361 and tag.  Good example from another classic location.  Great value.  15$

 

 

 

 

 

OKB-587

OKB-587    Goethite after Pyrite  Chestnut Hill, Lancaster Co., PA.  Ex. Dr. Steve Chamberlain Collection.  BIG 4 cm cube from the Ralph M. Lapham Collection, # 849-L.  Great example with pedigree.  85$

 

 

 

 

OKE-245

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OKE-245    Malachite     Shilu, Yangchun/ Chuncheng, Guangdong Prov., China.   A nice little malachite pseudo after azurite.  Unusual to see a full replacement from China.  The ball is 2.8 cm in diameter and free from damage.  Nice and unusual specimen.   60$

 

 

 

 

OKE-438

OKE-438    Pyrite Epimorph after Calcite    Pleasant Ridge, Indiana.  Ex. Art Edwards collection.   Nicely formed mold of pyrite crystals created over a once existing calcite crystal.  There is some minor pyrite disease on back of piece.  This is a large example of this material for this site (8 x 5 x 5 cm).  Normally this would be a far more expensive piece.  175$

 

 

 

 

OKE-0010

OKE-0010    Barite pseudo. after Witherite    Treloar Vein, Haggs Mine, Nestberry, Alston Moor, Cumbria, England.  (Type Locality for witherite) Ex. Dr. Steve Chamberlain Collection #465.  Here is a fine matrix piece from the famous Sir Arthur Russell pocket, circ. 1930.  This specimen is more unusual in form from the traditional witherite twin crystals.  It is composed of blocky pseudohexagonal crystals that are interlocked with each other on an unknown rock matrix which have been replaced by white barite.  These are truly ugly crystals!  They are white in color, with a low luster and little translucence.  The dimensions of this atypical specimen is 5.5 x 4.3 x 3.5 cm.  It is damage free.  This piece fluoresces orange in S.W.  U.V.   An unusual example of this rare carbonate mineral from a great, classic, European location.  Not very aesthetic but very desirable for its rarity and atypical form.   395$

 

 

 

 

These mineral specimens are classics from the famous Arkansas mineral region of Magnet Cove. The brookites are high luster, well formed crystals. Brookites from Magent Cove are a North American classic.        Most of the brookites from this classic site at Magnet Cove, Arkansas show growth hillocks on their surfaces.        Brookites from Magnet Cove, AR

 

 

 

 

 

 

OKD-392

Scepter close up

OKD-392    Pyrite Pseudomorph after Pyrrhotite   El Potosi, Santa Eulalia, Chihuahua, Mexico.  There is an impressive mix of showy minerals in this very displayable pseudomorph.  The primary crystal is a large pyrrhotite which has been encrusted by well formed pyrite crystals.  There are other pseudos on this piece but the largest is 5 cm long, 3 cm wide and 1.5 cm thick.  The quartz is clear to white and very nice with the largest crystals being scepters to 1.8 cm.  There is another metallic minerals and small groups of a cram colored mineral, as well, which could be muscovite.  No noticeable damage and very aesthetic.  10.5 x 6 x 6 cm.   220$

 

 

 

 

 

OKD-115

OKD-115   Goethite Pseudomorph after Pyrite     Ross Hill, Transvaal, South Africa.  Ex. Dr. Steve Chamberlain Collection.  Here is an unusual location for such nice specimens.  This material was acquired from Ward’s Science in Rochester back in the 1970’s.  I’ve never seen any of these in collections or on the market, so they must have been very short lived.  Interesting intergrowth of bars and morphed pyritohedrons in this elongated piece.  Nice luster and viewable from all directions.  6.5 x 3.5 x 3.5 cm overall.  120$

 

 

 

 

 

OKD-105

OKD-105    Goethite Pseudomorph after Pyrite     Ross Hill, Transvaal, South Africa.  Ex. Dr. Steve Chamberlain Collection.  Here is an unusual location for such nice specimens.  This material was acquired from Ward’s Science in Rochester back in the 1970’s.  I’ve never seen any of these in collections or on the market, so they must have been very short lived.  This one is a big partial cube which has been modified by dodecahedron?  Fine luster and very minimal striations.  4 cm on edge.  Very nice and unusual specimen.  90$

 

 

 

 

 

OKD-169

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OKD-169    Aragonite Pseudomorph after Calcite  Johnby Quarry, near Penrith Cumbia, England.   Ex. Dr. Steve Chamberlain Collection.This specimen was collected by Steve in his numerous travels in England.  4.7 cm long crystal of moderate luster and light cream color.  No damage.    26$

 

 

 

 

 

OKD-377

OKD-377   Cerussite on Malachite after Azurite    Tsumeb, S.W. Africa.  Ex. Nancy Collins Collection.   This is arguably the most valuable piece in Nancy’s collection.  It is a massive plate of malachite crystals to 5 cm each.  In its entirety it measures 18 x 17 x 6 cm.  In this we find approximately 60 to 70 twinned cerussite crystal to 1.7 cm each.  They are well formed, have a medium luster and stand up high off the matrix. It looks like six more crystals should be on this piece but they have been cleaved off leaving a smooth contact where they once were.  Even with this damage, which does not draw your attention, the specimen is a killer and a classic.  I have seen specimens one quarter of the size of this one with no cerussite command many thousands of dollars.  This one is far superior to any similar specimens that I have seen for sale over the years.  A one of a kind that should get center stage even in the most serious Tsumeb collection.  13,000$

 

 

 

 

 

OKD-106

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OKD-106    Goethite Pseudomorph after Pyrite     Ross Hill, Transvaal, South Africa.  Ex. Dr. Steve Chamberlain Collection.  Here is an unusual location for such nice specimens.  This material was acquired from Ward’s Science in Rochester back in the 1970’s.  I’ve never seen any of these in collections or on the market, so they must have been very short lived.  Big bar like crystal with striations on all faces.  Backside has five rider crystals.  Best piece of the lot.  7.7 x 4 x 3.6 cm overall.  120$

 

 

 

OKD-109

OKD-109    Goethite Pseudomorph after Pyrite     Ross Hill, Transvaal, South Africa.  Ex. Dr. Steve Chamberlain Collection.  Here is an unusual location for such nice specimens.  This material was acquired from Ward’s Science in Rochester back in the 1970’s.  I’ve never seen any of these in collections or on the market, so they must have been very short lived.  Primary crystal is an elongated  pyritohedron  which is intergrown with a tabular pyritohedron.  A couple of contacts, striations on most crystal faces and displayable from several views.  7.5 x 7.5 x 5 cm overall.  100$

 

 

 

 

 

OKD-112

OKD-112   Goethite Stalactite    Graves Mountain, Lincoln County, Georgia.  Ex. Dr. Steve Chamberlain Collection.  Here are some very colorful pieces from a classic east coast location.  Fantastic form and wonderful rainbow of colors in this 3.8 cm specimen.  45$

 

 

 

 

 

OKD-113

OKD-113   Goethite Stalactite    Graves Mountain, Lincoln County, Georgia.  Ex. Dr. Steve Chamberlain Collection.  Here are some very colorful pieces from a classic east coast location.  Fantastic form and wonderful rainbow of colors in this 5 cm specimen.  70$

 

 

 

 

 

OKD-114

OKD-114   Goethite Stalactite    Graves Mountain, Lincoln County, Georgia.  Ex. Dr. Steve Chamberlain Collection.  Here are some very colorful pieces from a classic east coast location.  Fantastic form and wonderful rainbow of colors in this 4.8 cm specimen.  35$

 

 

 

 

 

OKD-098

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OKD-098   Goethite, Calcite, Quartz   Coronation Lode, Between 1,400’ and 1,500’, Geevor Mine, Pendeen, Cornwall, England.  Ex. Dr. Steve Chamberlain Collection.  Here is a great classic Cornish piece with tiny calcites and quartz sprinkled on the casts formed from goethite after an unknown mineral.  Rich chocolate brown color.  Better in person.   10 x 9 cm and about 4 cm thick.  Classic Material!  100$

 

 

 

 

OKC-114 back

-114 front

OKC-114   Grossular on Wollastonite    Chiapas, Mexico.   Ex. Dr. Steve Chamberlain Collection.   Small light yellow grossulars to several millimeters each on dark brown (pseudomorphed?) wollastonite crystals to 3 cm each.  6 cm overall.  Another unusual piece.  40$ 

 

 

 

 

 

OKC-115

OKC-115   Grossular on Wollastonite    Chiapas, Mexico.   Ex. Dr. Steve Chamberlain Collection.   Small light yellow grossulars to several millimeters each on dark brown (pseudomorphed?) wollastonite crystals to 3 cm each.  Some wollastonite casts.  4.5 cm overall.  Another unusual piece.  25$

 

 

 

 

 

 

OKB-534

OKB-534   Elbaite on Quartz Pseudomorph of Tourmaline   Aruba Mine, Minas Gerais, Brazil.    These specimens began as tourmalines, were replaced by quartz and then coated by elbaite.  The cap of this one has no quartz core and is elbaite for almost a cm of its top.  This is the nicest I could find out of the 15 specimens purchased.  6.6 cm tall and 2.5 cm thick.  Back is not damaged.. crystal is scalloped in form.  Several chips on termination but still a great value on a two and 3/4 inch tourmaline.  Very impressive.  225$

 

 

 

OKB-535

OKB-535   Elbaite on Quartz Pseudomorph of Tourmaline   Aruba Mine, Minas Gerais, Brazil.    These specimens began as tourmalines, were replaced by quartz and then coated by elbaite.  The cap of this one has no quartz core and is elbaite for almost a cm of its top.  4.7 cm tall and 1.8 cm thick.  A couple areas show the elbaite stripped away and the quartz core visible.  95$

 

 

 

 

 

OKB-536

OKB-536   Elbaite on Quartz Pseudomorph of Tourmaline   Aruba Mine, Minas Gerais, Brazil.    These specimens began as tourmalines, were replaced by quartz and then coated by elbaite.  5.5 cm tall and 2 cm thick.  Very nice form to this one.  A couple chips on termination but still an excellent value on a two plus inch tourmaline.  Very impressive.   170$

 

 

 

 

OKB-576

OKB-576    Goethite Pseudomorph after Pyrite   Colorado.   Ex. Dr. Steve Chamberlain collection, acquired from Ward's, Prev. C. B. Sawyer collection #182.  Big 5 cm pseudo.  Classic, just wish I had a more specific location.  Big crack on one side but very stable.  Great value for some Colorado collector at 130$

 

 

 

 

OKB-577

OKB-577    Stilbite, Stevensite Pseudo after Pectolite   Parrsboro, Nova Scotia, Canada.  Ex. Dr. Steve Chamberlain collection, acquired from Dr. David Potter.  What a wonderful piece.  An exceptional 12 cm specimen with not one, but two pseudos ot 4 cm each.  The best one of these I have ever seen had only a single ball, was smaller and as expensive as this one.  This is a rare and exceptionally clean piece.  850$

 

 

 

 

OKB-212 Front and Back

OKB-212    Stibniconite after Stibnite   Hunan Province, China.   Yellow pseudomorph replacement of stibnite crystals.  Several big crystals to over 16 cm form a slightly divergent spray.  Surface scrapes on backside of specimen.  40$

 

 

 

 

OKB-582

OKB-582     Pyrite pseudo after Marcasite, Calcite and Sphalerite   Nanisivik Mine, Baffin Island, North West Territories, Canada.  Ex. Dr. Steve Chamberlain Collection, Acquired from the National Museum of Canada Collection # 49122.  Lots of big pseudos with double terminated calcites to a cm and minor sphalerite crystals.  75$

 

 

 

 

OKB-583

OKB-583     Pyrite pseudo after Marcasite, Calcite and Sphalerite   Nanisivik Mine, Baffin Island, North West Territories, Canada.  Ex. Dr. Steve Chamberlain Collection, Acquired from the National Museum of Canada Collection # 51893.  Great plate of crystals with good sphalerites to over a cm each and minor calcites.  90$

 

 

 

 

OKB-585

OKB-585     Pyrite pseudo after Marcasite, Calcite and Sphalerite   Nanisivik Mine, Baffin Island, North West Territories, Canada.  Ex. Dr. Steve Chamberlain Collection, Acquired from the National Museum of Canada Collection # 49121.  Nice piece with great pseudos and good amounts of calcite.  These calcites are small crystal approaching a cm in size.  90$

 

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