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Identity HelpVanadinite
31st Aug 2017 17:49 UTCMike Ash
I need a little assistance on a vanadinite specimen and another that seems mislabeled as vanadinite. One of these is from the Apache Mine, Gila Co, Arizona.
The first set of images, I'm 100% certain are vanadinite. The red-orange crystals are clearly hexagonal with many at least 1mm in size. I'm not sure of the matrix.
The second specimen that was tagged as V from the Apache Mine is more purple in color and I'm unable to see a clear crystal structure with naked eye or with a Supereye camera. In the black/gray matrix, several clear or white tabular crystals are 4mm-5mm long. The matrix also has some other red mineral associated that seems like iron/rust.
Any help is appreciated.
31st Aug 2017 22:10 UTCEd Clopton 🌟 Expert
31st Aug 2017 23:41 UTCMike Ash
1st Sep 2017 01:03 UTCKevin Conroy Manager
1st Sep 2017 03:38 UTCGregg Little 🌟
1st Sep 2017 04:46 UTCMike Ash
1st Sep 2017 08:35 UTCGregg Little 🌟
I am not sure what you are getting a streak from as it has to limited to single minerals. The matrix could and probably contains more than one mineral so the streak is a composite of colours and not really diagnostic. Also matrix can be brittle or crumbly or very hard, it just depends on the genesis from the type and number of minerals involved. For that reason hardness is not definitive either. The only way is to use magnification and attempt to identify individual minerals, otherwise just label it as matrix.
If the larger crystals are quartz then hardness will be over 6, as long as the "scratch" is not confused with removal of the apparent coating material. If you review some literature on the Apache deposit there will probably be descriptions of the ore body's gauge minerals and host rock. That would be much easier than agonizing over identifying the matrix mineral make-up.
1st Sep 2017 15:57 UTCMike Ash
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