Manganosite With Jacobsite, Sonolite, Zincite - Franklin, NJ
Item History & Price
| Reference Number: Avaluer:4292907 | Country/Region of Manufacture: United States |
| Franklin Mineral Museum: Mineral species |
A classic rarity from the Franklin Mine. This is an example of manganosite and one of the truly rare classic mineral species from Franklin. Obtaining a good example is in itself a rarity today. Manganosite is manganese oxide and it is one of a number manganese oxides, including birnessite, hausmannite, manganite, psilomelane and pyrolusite. This assemblage is well known among Franklin and Sterling Hill mineral collectors. There are abundant dark red, resinous zincit...e masses and partings throughout the matrix. Next are the large grains and small nodules of black, metallic franklinite. Next are the pale brown, sub-vitreous grains, sections and small masses of sonolite. Sonolite occurs as large, pinkish-brown grainsintergrown with zincite. The grains have smooth, rounded outlines. Next is jacobsite, a manganese iron oxide, occurs as sub-metallic intergrowths with the zincite. Lastly is the manganosite which is seen here as emerald green, lustrous partings throughout the matrix. (Note the photographs above). Crystals are extremely rare. The mineral has an octahedral parting and a somewhat symmetrical development of parting can mimic an octahedron. Cleavages often show a parquet texture. Bear in mind that manganosite, being a manganese oxide, commonly oxides to a black color. This black coloration can be seen on the parting surfaces of zincite. The specimen has a flat sawn surface, evidently the resulting cut was used for analysis at the university. This specimen is a must have for any mineral collector of the Franklin and Sterling Hill zinc mining district.Dimensions are 8.9x4.6x4.3cm - 3½x1¾x1¾in. Please note the centimeter cube and inch bar for scale.From the Franklin Mine, NJ.The previous collection this specimen was in is #123, the Princeton University Collection.#123 is the museum's Collection Sale number previously offered in the museum shop.>>> We do COMBINED SHIPPING for multiple items. To request an invoice from us that combines shipping ALWAYS click the Add to cart button in eBay to add items until you are done. DO NOT PROCEED to checkout, rather go click the Request Total from Seller button. <<< === There is an instructional video on how to request combined shipping is here https://www.youtube.com/watch?v=FvDe7Fg7R4Q === All potential buyers need to be aware of the fact being 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 as UV C. Always read the description carefully to determine if the main mineral of interest for a particular specimen will fluoresce. There are several available brands and models of ultraviolet lights on eBay and other online sources. For further information on ultraviolet light and fluorescent mineral go to Geology.com and then look under >> Minerals >> Fluorescent Minerals.>>>> 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.--- All photographs appearing on this listing or any other Franklin Mineral Museum listing are the property of the Franklin Mineral Museum. Photographs can be used strictly for personal use only. Otherwise the photographs posted here are protected by U.S. Copyright Laws, and are not to be downloaded or reproduced for public use or distribution in any way without the written permission of the Franklin Mineral Museum. ---
