File:Gahnite-826479.jpg

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Description
English: Gahnite

Dimensions: 9.6 cm x 6.7 cm x 5.8 cm

Locality: Passaic pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin mining district, Sussex County, New Jersey, USA
This is without a doubt the sharpest and most lustrous individual crystal of gahnite that I've seen from the famous Passaic Pit locality at Sterling Hill. A 2.3 cm octahedron with stunningly mirror like luster and incredibly smooth faces is centered among the calcite/augite/hendricksite matrix. On a side note, hendrickite is the only Zn-dominant mica currently known, which makes sense as it's associated with gahnite, essentially a Zn-dominant member of the Spinel Group. Gahnite is rarely found in crystals this size that aren't distorted, rounded, "lumpy"/etched or just plain crude looking from any locality in the world. I've seen some sharp crystals from the Passaic Pit, and I've seen some lustrous crystals, but never have I seen both qualities combined in a gahnite like this one. With strong lighting, you can flashes of deep emerald/chrome green on the surface, so the crystal is not black. From the collection of Senator/Dr. Miguel Romero of Teuhuacan, Mexico (Collection #2208). For more information on this important collection, use the link to this free online copy of our 2008 book on his collection: http://www.irocks.com/e-book-romero/.
Deutsch: Gahnit
Größe: 9,6 cm x 6,7 cm x 5,8 cm
Fundort: Grube Passaic, Sterling Hill, Ogdensburg, Bergbaubezirk Franklin, Sussex County, New Jersey, USA
Date before June 2017
date QS:P,+2017-06-00T00:00:00Z/7,P1326,+2017-06-00T00:00:00Z/10
Source https://www.mindat.org/photo-826479.html (Mindat-ID 3MY-WMC)
Author
Robert M. Lavinsky  (1972–)  wikidata:Q56247090
 
Alternative names
Robert Matthew Lavinsky; Lavinsky, Robert M.; Lavinsky R M
Description American mineral collector and mineral dealer
iRocks.com (Mineralogical Record)
Date of birth 13 December 1972 Edit this at Wikidata
Location of birth Columbus
Authority file
creator QS:P170,Q56247090
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Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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current15:56, 22 September 2018Thumbnail for version as of 15:56, 22 September 2018864 × 864 (536 KB)Ra'ike (talk | contribs)== {{int:filedesc}} == {{Information |Description= {{en|1=Gahnite Dimensions: 9.6 cm x 6.7 cm x 5.8 cm :: Locality: Passaic pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin mining district, Sussex County, New Jersey, USA :: This is without a doubt the sharpest and most lustrous individual crystal of gahnite that I've seen from the famous Passaic Pit locality at Sterling Hill. A 2.3 cm octahedron with stunningly mirror like luster and incredibly smooth...

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