Franklinite crystals - Sterling Hill, Ogdensburg, NJ For Sale
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Franklinite crystals - Sterling Hill, Ogdensburg, NJ:
Two prominently exposed franklinite crystals. A true classic of the Franklin and Sterling Hill mining district. In many mineral publications and references the accompanying illustrations, hardly fail to depict a fine example of franklinite crystals. The crystals are embedded in a coarse, white, translucent calcite and the crystals all have a sub-metallic black finish. All have the classic renown octahedral form with some minor cubic prismatic modification appearing. Embedded along with the franklinite crystals are several smaller franklinite crystals along with crude sections of dull lustered brown willemite. The enclosing typical coarse, opaque calcite is white in color with a dull luster. Do note several of the franklinite crystals are naturally fractured and are "healed" by thin layers of white to yellowish calcite. This is a common feature for many franklinite crystals from the Franklin and Sterling Hill zinc mining district. This is a representative example of well-formed, recognizable franklinite crystals.
Franklinite was named in 1819 by Pierre Berthier for the type locality of Franklin Furnace (now Franklin Borough), New Jersey. Silliman (1920) translated Berthier's article: "As the chemical nomenclature cannot in every instance furnish a name, I propose to give it that of The Franklinite, in order to remind us that it was found, for the first time, in a place to which the Americans have given the name of a great man, whose name is equally venerated in Europe as in the new world by all the friends of science an humanity." and this would obviously be Benjamin Franklin. Franklinite is a member of the spinel group, the only one of three spinel family members to have zinc, gahnite and zincochromite being the others. This species has been reported and observed in many world localities, though, nowhere else in minable quantities.
Dimensions are 9.1x6.1x6.9cm - 3½x2½x2¾in. Please note the centimeter cube and inch bar for scale.
Weight in grams and ounces: 420.9 g - 148.5oz.
From the Sterling Mine, Ogdensburg, NJ.
The previous collection this specimen was in is #156, Albert Weemstra.
#156 is the museum's Collection Sale number previously offered in the museum shop.
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All potential buyers need to be aware of the factbeing able to view fluorescent minerals requires an ultraviolet light. Most of the minerals from the Franklin and Sterling Hill zinc mining district fluoresce under shortwave ultraviolet light. The shortwave wavelength is 254nm or otherwise known asUV C. Always read the description carefully to determine if the main mineral of interest for a particular specimen will fluoresce. There are several availablebrands and models of ultraviolet lights on and other online sources. For further information on ultraviolet light and fluorescent minerals,copy and paste and go to >>> align="center">>>>> We Buy Collections <<<<
DISCLAIMER: Every reasonable effort was made to accurately identify the mineral specie(s) noted in each specimen. The occasional label from previous collection(s) may misidentify some species and the current title and description here reflects the latest mineral specie(s) identification. There may or may not be any fluorescent mineral specie(s) present in this specimen. A fluorescent photograph may not have been included for a number of reasons. Chief among these are; there may not be any fluorescence in this particular specimen. If there are fluorescent specie(s) it is considered minor and not the particular specie(s) of note in this particular specimen. Another reason not including a fluorescent photograph is the mineral species may be too weak to successfully record even with modern photographic technology and with photo-enhancement. If there was such a fluorescent species present in this specimen, it would be noted in the descriptive text. A modest effort was made to depict a fluorescent specimen accurately as possible, but some overexposure should be expected in some photographs to compensate for a weak response of a fluorescent specimen.
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