Arizonal locality
20th Nov 2016 19:59 UTCR. Peter Richards Expert
I can find nothing about this locality. The only Constellation I can find is in Yavapai County, not far to the north of the northern border of Maricopa County. No apatite group minerals are listed from there!
Does anyone have any information about an appropriate locality for these crystals?
Thanks,
Pete Richards
OK, I will now make this wild goose chase even wilder. I perhaps should start a new thread, but this is related to the previous stuff and I hate to proliferate threads.
1) The previous inquiry was prompted by discovering that the locality for one of my specimens did not seem to make sense.
2) I was looking at that specimen because I got a new sample recently that had no locality information at all.
3) The new sample is similar to the specimens I started this thread with in being an apatite group mineral with yellow prisms and orange tips, though the new ones are really elongated crystals, and characterized by their splitting at the ends where they turn orange.
4) Preliminary EDS seems to indicate that these are mimetite with a vanadinite core - more work on oriented cross sections is needed....
5) EDS also indicates that tiny associated crystals are descloisite.
So what I REALLY want to know is where these elongated crystals come from. Most likely from the southwest, possibly Arizona but maybe not.
Any offers on this one?!!! The crystals shown are about 1 to 2 mm long.
1) The previous inquiry was prompted by discovering that the locality for one of my specimens did not seem to make sense.
2) I was looking at that specimen because I got a new sample recently that had no locality information at all.
3) The new sample is similar to the specimens I started this thread with in being an apatite group mineral with yellow prisms and orange tips, though the new ones are really elongated crystals, and characterized by their splitting at the ends where they turn orange.
4) Preliminary EDS seems to indicate that these are mimetite with a vanadinite core - more work on oriented cross sections is needed....
5) EDS also indicates that tiny associated crystals are descloisite.
So what I REALLY want to know is where these elongated crystals come from. Most likely from the southwest, possibly Arizona but maybe not.
Any offers on this one?!!! The crystals shown are about 1 to 2 mm long.
Thanks for the answer and sorry for my late response.
It was very interesting to hear some background on these specimens. I have added them to my catalogue and pictures are coming soon. I'll include some in this thread meanwhile.
I have dug down a bit more in my notes from when I acquired these specimens. They were all bought in 2013. The last tricky one is quite rough on the surface so I might have misinterpreted the number on that one. It was also sold as "Fluoborite (TL), Ludwigite - Tall mine, Norberg, Sweden".
The correct number might be 3467. It definitely isn't the "Ludwigite and magnetite" specimen as there are no magnetic minerals in this one. The surface is a bit weathered except for one side that is cut. I don't feel confident that the minerals are what the label says so I have filed this under questionable specimens requiring more testing.
Is there an entry for #3467 and what does it say?
And here is the other two rocks.
It was very interesting to hear some background on these specimens. I have added them to my catalogue and pictures are coming soon. I'll include some in this thread meanwhile.
I have dug down a bit more in my notes from when I acquired these specimens. They were all bought in 2013. The last tricky one is quite rough on the surface so I might have misinterpreted the number on that one. It was also sold as "Fluoborite (TL), Ludwigite - Tall mine, Norberg, Sweden".
The correct number might be 3467. It definitely isn't the "Ludwigite and magnetite" specimen as there are no magnetic minerals in this one. The surface is a bit weathered except for one side that is cut. I don't feel confident that the minerals are what the label says so I have filed this under questionable specimens requiring more testing.
Is there an entry for #3467 and what does it say?
And here is the other two rocks.
