May 2016 Update, Page 3


Recently Acquired

The Harold L. Dibble Collection

Harold Dibble, is the author of "Quartz: An Introduction to Crystalline Quartz", and was a well known east coast collector.  He passed in 2014 and his collection of fine minerals will be offered in upcoming months.  Some of his most important specimens grace the displays in the Seaman's and Smithsonian museums.  Harold's passions also included art and he was early in recognizing minerals as Nature's works of art.  Many of his minerals reflect this ideal. 




The tiny back spot at top right of this and the next image has been removed.

Scew dislocation

OKN-976     Topaz with Screw Dislocation     Virgem da Lapa, Jequitinhonha Valley, Brazil.  Ex. Harold L. Dibble collection.  This is a pleasing light to medium blue, natural topaz of very high quality.  The really unusual part is it obvious screw dislocation growth feature running its entire length parallel to the "c" axis.  More common in the beryl family of minerals these are quite uncommon in topaz crystals.  This one is only a couple millimeters wide but is much more obvious than my one image indicates.  It can be seen very clearly through the largest of the five non-etched faces.   Take my word on this one..."you can't miss it"! 

The luster on this fine specimen is exceptionally high showing no frosting or abrasion.  It is a damage free floater showing many surfaces etched to different degrees.  Some quite lightly and others heavily leaving behind razor sharp edges.  Internally all gem showing none of the typical veils or internal fracturing.  I only do point and shoot photography for these listings and this is one of those specimens that deserves better.  The crystal views great from any side and sits perfectly for display without a base.  Only one small chip on backside.  It is exquisite in hand and likely the finest specimen from Harold's collection.  7 x 6.6 x 5.5 cm overall.  $8,500








OKN-977    Crocoite     Adelaide Mine, Dundas, Tasmania.  Ex. Harold L. Dibble collection.  9.5 x 8.8 x 6 cm.  Bright red example with stocky hollow crystals and smaller crystals on same piece.  The large crystals are always difficult to tell if they are fully formed or broken.  I think this specimen is in excellent shape when closely inspected but some ends could be broke vs. terminated.  You'll have to be the judge.  Again, it looks to be in excellent shape from what I can tell.  $750








OKN-978     Barite with Calcite       Rock River, Yukon.  Ex. Harold L. Dibble collection.  Big blue blocky barites with dustings of calcite rhobs.  8 x 6 x 6 cm with only one crystal showing s corner having damage.  Specimen is well crystallized on every side (a floater).  $175








OKN-979    Cobaltosmithsonite     Tsumeb Mine, Tsumeb, Namibia.  Ex. Harold L. Dibble collection.  Attractive, transparent smithsonites in some cases up to almost a cm each (probably averaging more like a half cm each), scattered everywhere on this 7.4 x 7.2 x 6 cm piece.  No damage, views well form any direction.  Crystals have very fine luster while the overgrowths (likely also smithsonite) do not.  $650








OKN-980    Calcite    Citrus County, Florida.  Ex. Harold L. Dibble collection.  A gemmy yellow floater measuring 10.5 x 3.8 x 3.8 cm.  No damage.  If you like etched crystals this is certainly a fine one.  $150








OKN-981    Calcite on Smithsonite with Dioptase and Duftite?      Tsumeb Mine, Tsumeb, Namibia.  Ex. Harold L. Dibble collection.  A nice domical piece with clear to milky calcite rhombs coating a matrix of grayish green smithsonite and what appears to be duftite.  The specimen is 9.3 x 7.1 x 6 cm.  The tiny green crystals on the calcites are very small, gemmy dioptase crystals.  Damage is evident along the edges from contact and present (but minor) on the body of the specimen.  Not a bad specimen!  Well priced at   $400








OKN-941    Orpiment     Quiruvilca, Peru.  Ex. Harold L. Dibble collection.  An 8 x 4.3 x 3.2 cm cluster of crystals.  One crystal has been crushed/ broke as can be seen.  $100









OKN-942      Amethyst    Brandberg, Namibia.  Ex. Harold L. Dibble collection.  A single point with small scepter stem. Damage free.  Deep purple but transparent showing inclusions, phantoms and other features typical of this material.  $50








OKN-043      Smithsonite     Tsumeb Mine, Tsumeb, Namibia.  Ex. Harold L. Dibble collection.  Nice transparent crystals to 1.4 cm each in two generations...small, second generation crystals on the larger first generation ones.  3.8 x 3.8 x 2 cm.  Very nice pink color with excellent transparency/ translucence.  One micro cleave that is invisible without magnification.  $130








OKN-945     Aragonite     Minglanilla, Cuenca, Spain.  Ex. Harold L. Dibble collection.  A purple and green zoned single crystal measuring a respectable 5.5 x 3.5 x 3.5 cm.  Nice luster and no damage.  once more common now seldom seen for sale.  $70








OKN-946    Stilbite    Nasik, India.  Ex. Harold L. Dibble collection.  7.8 x 4.4 x 4.5 cm plate with one large second generation stilbite on a crystalline stilbite matrix.  No damage.  $40


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