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Looking for help trying to identify find
Woody
post Oct 29 2012, 08:18 PM
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By chance anyone have a clue as to what this mineral/Rock/Gem might be?

I was out this weekend rooting around in the ground and found a spot where someone long ago had dug for fluorite. I was looking though their debris pile and had found several small, low grade pieces with some purple and green showing. Often when I am out and about I will keep pieces or chunks of smoky quartz, especially if they are deep black, “Ooh Shiny”. So when I picked this piece up that’s what I thought it was smoky quartz. I never would have kept such a small piece, “it is only 1 inch wide and about 1 ½ inches long” but once I picked it up I could tell the fracture was not what one would expect from quartz. I couldn’t bring myself to through it away so I tossed it in my pack knowing I could look at it again after I cleaned it off.

So I got home and was washing all my finds off and got to this one. When I picked it up this time I did not have gloves on and immediately noticed another strange characteristic, it was unusually heavy for its size. After I cleaned it off I could see that although it looked black at first, I believe it is actually an intense red. There is one small spot that is damaged and it shows dark red. Difficult to tell though as light will not pass through it.

Additional info/Re-cap;
1. Intense black and shiny.
2. Does not fracture like quartz. It is uneven and chunky.
3. Does not scratch with good knife or file.
4. Very heavy in weight. I would say it has a specific gravity about that of iron.
5. It is extremely opaque, light will not pass through it even around the edges.
6. Small damaged area shows red.
7. It is associated with decomposing granite on one end and microcline on the other.

That’s about all I got. Any guesses? Woody

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theschwartzz
post Dec 27 2012, 05:14 PM
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Looking for assistance to identify geometric chevron shaped inclusions in a Brazilian Amethyst cluster.
It has a plethora of Goethite inclusions (commonly known as Cacoxenite) and a number of these other inclusions that exactly parrot the shape of the Amethyst face that encompasses it.
Therefore some are triangular and some have a flat top mimicking the facet, and they are made up of a profusion of tiny black specs under 20X with spaces in between.
One area has a few that are more solid with one also exhibiting several deep orange areas.

Is this likely to be Lepidocrosite (or Hematite) or another form of the Goethite?
Have a couple of pictures if that would help.

Also is there an easy way to tell Lepidocrosite apart from Brookite when there are only amorphous black shapes present?

Thank you
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