Colorado Mineral Specimens

 

 

OKF-137

OKF-137    Sphalerite with Siderite    Eagle Mine, Gilman, Colorado.  Ex. Jim Turek Collection.  A superior display piece from Colorado measuring 9 x 5 x 3 cm.  It sits on edge and displays a fully crystallized frontal face that is extremely aesthetic.  The siderites are tabular and light tan in color and perfectly dispersed within the sphalerites.  The sphalerites show two types of crystal face development: the first is highly lustrous mirror like faces, while the second harvest slightly lower luster with unique surface feature growths.  A great specimen for the Colorado collector.  $750

 

 

 

 

OKF-075

OKF-075     Barite    Grand Junction, Colorado.  Ex. Dr. Steven Chamberlain collection.  This large TN specimen measures in at 3.4 x 3.1 x 2.5 making it barely able to fit into a Perky box.  The big crystals are clear with some veils of inclusions.  An attractive, displayable specimen with no damage.  100$

 

 

 

 

 

OKF-035

OKF-035    Rhodochrosite on Quartz with Sphalerite and Pyrite   Sweet Home Mine, Alma, Colorado.  Ex. Jim Turek Collection.  Damage free piece with several rhodos to 1.5 cm each.  Nice gemmy crystals that are networked into the quartz yet stand up well for display.  The backside of the specimen is sawn flat as most are from this location.  7.5 x 6 x 2.5 cm thick.  Add some color to your collection with this fine specimen.  500$

 

 

 

 

 

OKF-033

Gemmy rhodos.

OKF-033    Rhodochrosite on Quartz with Sphalerite and Pyrite   Sweet Home Mine, Alma, Colorado.  Ex. Jim Turek Collection.  7.4 x 4.2 x 3.2 cm matrix specimen which has been sawn down to a perfect size.  Stands on edge and displays its gemmy rhodos nicely.  The crystals are up to 1 cm on edge.  One looks to be smoothly cleaved while all others are damage free.  Showy and desirable specimen.  800$

 

 

 

 

 

OKE-096

OKE-096    Barite    Stoneham, Wield County, Colorado.  Beautiful, blue, translucent, double terminated crystals forming a cross shaped display.  There is a tiny crystal which penetrates a termination on the large crystal which is cleaved, otherwise damage free.  Measures 6.1 cm.  Sorry, but the photo of this one is very poor.  Fantastic piece for this price.  40$

 

 

 

OKE-097

OKE-097    Barite    Stoneham, Wield County, Colorado.  Beautiful, blue, translucent, single terminated crystals in parallel growth.  Damage free.  Measures 5.6 x 3 x 1.3 cm.  Fantastic piece for this price.  35$

 

 

 

OKE-055

Best color representation.

OKE-055    Barite    Stoneham, Wield County, Colorado.  Beautiful, blue, translucent, double terminated crystals forming an display.  Damage free.  Measures 7 cm.  Fantastic piece for this price.  40$

 

 

 

OKD-844

Back

OKD-844    Barite     Stoneham, Weld Co., Colorado.  Ex. Dr. Steve Chamberlain Collection.  A nice big grouping of parallel growh barites to 5.7 cm each.  The crystals are a nice blue color, translucent to transparent and well formed.  Basil contact and a small crystal missing on back.  A very good specimen for this Colorado location.  80$

 

 

 

OKD-836

Backs

OKD-836    Microcline    Crystal Peak, Colorado.  Ex. Dr. Steve Chamberlain Collection.   A pair of double terminated feldspars which are low on luster but high on form.  One measures 3.5 and the second 2.5 cm in length.  Classic material.  75$

 

 

OKD-753

OKD-753    Covellite     Summetville, Colorado.  Ex. Jim Turek Collection.  2.5 x 2.5 x 1.8 cm cluster of high luster, metallic crystals.  Attractive specimen!  50$

 

 

 

OKD-596

OKD-496    Rhodochrosite    American Tunnel, San Juan Co., Colorado.  Ex Nancy Collins Collection.  Here is a fine thumbnail specimen measuring 1.9 x 1.8 x 1.4 cm.  Most of the piece is composed of a single complex rhodo of good color.  Nice associations if pyrite and quartz add color and character.  Zero damage.  In Perky box.  70$

 

 

 

OKD-497

Bottom of specimen.

OKD-497    Rhodochrosite    American Tunnel, San Juan Co., Colorado.  Ex Nancy Collins Collection.  1.5 x 1.5 x .9 cm rhomb of rhodochrosite on crystalline and massive quartz.  Overall dimensions are 4.5 x 3.5 x 2 cm.  This piece has an old style collection number on its base as well as some residual Styrofoam from a previous mount.  The crystal is beautifully formed and resting up high on the matrix.  A nice specimen from a classic American locale.  350$

 

 

 

OKD-498

OKD-498    Rhodochrosite    American Tunnel, San Juan Co., Colorado.  Ex Nancy Collins Collection.  A small grouping of deep ping interlocking, tabular rhombs to 1.2 cm each.  The cluster is 2 x 1.2 x 1 cm and has what appears to be minor crystals of sphalerite.  Every view is a good one on this piece.  A very attractive and desirable thumbnail specimen.  65$

 

 

 

OKD-499

OKD-499    Rhodochrosite    Sweet Home Mine, Alma, Colorado.  Ex Nancy Collins Collection.  2 cm gemmy rhomb with about 50% clean faces and 50% cleaved and having matrix contact.  Minor quartz and a visible inclusion of sphalerite or tetrahedrite.  Cherry red and great translucence.  125$

 

 

 

OKD-396

OKD-396    Goethite on Quartz     Crystal Peak, Colorado.  This is a very interesting specimen with acicular crystals of goethite spraying upward off a tabular crystal of quartz.  On the main spray of goethite are two rhombohedral casts of goethite after ? (probably calcite).  The quartz is 7.2 x 3 cm yet only .7 cm thick.  I would not call this one very displayable due to poor mix of colors but it is quite unusual and interesting.  The quartz is double terminated and highly included by goethite.  No damage.  An uncommon find for this area of Colorado.  95$

 

 

 

OKD-371

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OKD-371     Manganocalcite      Ouray, Colorado.  Ex. Nancy Collins Collection.   The grouping of crystals here measures 8 x 4 x 2 cm and is a pleasing pink color which is slightly darker than the photo indicates.  Individual crystals reach 5 cm.  On backside there is a crystal that is cleaved off.  Wonderful front view.  320$

 

 

 

OKD-362

OKD-362    Manganocalcite   Silverton, Colorado.  Ex. Nancy Collins Collection.  This fine  classic has stepped growth schalenohedral crystals to 3 cm each totally coating one face of the specimen.  The color is a light translucent pink.  The specimen is pinker than the photo indicates.  No damage.  12 x 10 cm and 5 cm thick.  A nice addition to any Colorado collector’s collection.  625$

 

 

 

OKD-344

OKD-344    Native Gold   Dixie Mine, Colorado.   Ex. Nancy Collins Collection.   This piece is composed of multiple blades of gold to 1.5 cm each nicely displayed within and above a white matrix.  3 x 2.2 x 1.2 overall.  Quality specimen.  380$

 

 

 

OKD-312

OKD-312    Rhodochrosite   American Tunnel, Silverton, Colorado.   Ex. Nancy Collins Collection.  Rhodo rhombs coated by quartz druze on the main face of this small cabinet specimen.  On top of this is a single rhomb of pink rhodochrosite which measures 1.5 cm on edge.  There is a chip (cleave) on one corner.  Other areas are very rough which appears to be in-situe  damage or growth or both.  I priced this as being natural (and bought it as such).  Now I question this enough to feel I have to cut the price in half.  It displays nicely several ways and is still a quality specimen.  Great North American classic at a fine price.  Not 1,500….750$

 

 

 

OKD-154

OKD-154    Pyrite and Bravoite   Colorado.  Ex. Dr. Steve Chamberlain Collection.  Wards Mineral piece with old tag.  5 x 3 cm display face on this metallic specimen is fully crystallized.  Appears to be all pyritohedrons of moderate luster.  I know nothing about bravoite so can’t comment on it.  50$

 

 

 

OKD-150

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OKD-150    Orhtoclase Twin   Rustler Gulch, Gothic, Colorado.  Ex. Dr. Steve Chamberlain Collection.  Perfect 3.2 cm, opaque, floater.  Unusual location which produced specimens back in the mid 1970’s.  Zero damage.  28$

 

 

 

OKD-124

OKD-124    Rhodochrosite and Pyrite on Quartz     Sweethome Mine, Alma Colorado.  Pink rhodos to .7 cm on edge resting on bed of quartz and some minor pyrites.  Good representative specimen but certainly not one of those killers costing thousands.  50$

 

 

 

OKC-071

OKC-071  Sphalerite and Calcite?   Gilman, Colorado.  Acquired from Dottie Herman, circ. 1964, Ex. Dr. Steve Chamberlain Collection.  Great old Colorado piece which measures 7. 5 x 5 cm.  It is a plate which has nice bulges of sphalerite crystals to .4 cm each.  Calcites? are tabular and up to .7 cm each.   Classic material.  Very fairly priced at 80$

 

 

 

OKB-615

OKB-615    Dolomite pseudo. After Orthoclase   Kokomo, Colorado.   Ex. Dr. Steve Chamberlain Collection.  Great twins which display nicely.  50$

 

 

OKB-954

OKB-954   Feldspar? Quartz? Pseudo by Tourmaline????  Lake George, Colorado.  Self collected piece from many years ago.  Came from a small pocket which contained nice quartz crystals and a couple of these weird things.  Small unknown crystals on the surface.  In TN perky box.  18$

 

 

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-264

OKB-264    Amazonite   Crystal Creek? (maybe Crystal Peak), Colorado.   Super color to this individual 3 x 3 x 2.5 cm crystal.  In perky box.  12$

 

 

OKA-860 Smoky Quartz Lake George, Colorado. Big 15 cm long point that tapers from 7 cm wide at base to about 5.5 cm wide just below its termination. No damage... partially regrown where it was broken away from its matrix by "Mother Nature". Nice form, luster, translucence and lots of character to this classic piece. 90$

 

 

OKB-013

OKB013 Barite Hartzel, Colorado. A pair of parallel growth, blue crystals make up the entire specimen. This 4.5 x 3 cm piece displays nicely. 10$

 

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