Cold cases. Yellow orange unidentified on hydrotermalite.
Last Updated: 9th May 2016By Giuliano Bettini
Reasons for health and old age, my "mineralogical trips" to the island of Elba and Leghorn Mountains have stopped.
Now I'm doing photos.
I'm reordering my old collection.
Here I am referring to the locality Nibbiaia, Rosignano Marittimo, Livorno Province, Tuscany, Italy.
http://www.mindat.org/loc-252520.html
Locality description:
Radiolarites & Hydrotermalites, about 800m east-south-east of Nibbiaia.
Mineral list: Anatase, Brookite, Quartz. Millerite, etc.
I was examining some samples of this area. Here in the past were mainly found Anatase.
Carefully examining etched samples (cold dilute HCl), interesting "unknown" are appearing.
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In the very first time, examining a sample under the microscope, I saw this acicular crystal (Field of View: 1.5 mm).
Subsequently, in fact, I have noticed that this and other samples contain rare fragments of a yellow-orange material.
So I decided to make a sweep analysis of different specimens.
I have thus noted the presence of other crystals, and yellow-orange crusts and coatings here and there on the specimens.
I show some pictures.
Crystals.
Small masses, coatings (very rare). FoV 3 mm.
------------------------------
Is it the same mineral?
I suppose yes, even if sometime the crystals appear slightly more orange, and the crusts slightly more yellow.
Comparison:
Yellow orange unidentified is unidentified. So far.
Now I'm doing photos.
I'm reordering my old collection.
Here I am referring to the locality Nibbiaia, Rosignano Marittimo, Livorno Province, Tuscany, Italy.
http://www.mindat.org/loc-252520.html
Locality description:
Radiolarites & Hydrotermalites, about 800m east-south-east of Nibbiaia.
Mineral list: Anatase, Brookite, Quartz. Millerite, etc.
I was examining some samples of this area. Here in the past were mainly found Anatase.
Carefully examining etched samples (cold dilute HCl), interesting "unknown" are appearing.
------------------------------
In the very first time, examining a sample under the microscope, I saw this acicular crystal (Field of View: 1.5 mm).
Subsequently, in fact, I have noticed that this and other samples contain rare fragments of a yellow-orange material.
So I decided to make a sweep analysis of different specimens.
I have thus noted the presence of other crystals, and yellow-orange crusts and coatings here and there on the specimens.
I show some pictures.
Crystals.
Small masses, coatings (very rare). FoV 3 mm.
------------------------------
Is it the same mineral?
I suppose yes, even if sometime the crystals appear slightly more orange, and the crusts slightly more yellow.
Comparison:
Yellow orange unidentified is unidentified. So far.
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Nibbiaia, Rosignano Marittimo, Livorno Province, Tuscany, Italy