Mineral ExchangesWill trade specimen for photomicrography of it
Hi,
I have specimen that way too beautiful for my cheap digital microscope. One example
is very interesting vermicular Spinel.
As the title says, I will trade such specimen in return for good photomicrograph of it.
If you're interested simply send me a private message with your mail address as well
as a couple photomicrograph to show what your equipment can do.
Thanks!
That is a synthetic blue fiber. 
You're wrong Reiner, it's a serie of macles side by side left over after the Olivine weathered off.
Here's another example, different color same structure
I don't know, they are way too small for me to manipulate them, the field of view
on these images is around 1mm
There's just too many occurrences on too many specimen coming from several
sources for it to be a coincidence.
Seems to me you have photos of at least three different things. As far as I can tell photo VS01 is not a mineral ( colored thread) and NNo1 and NNo2 are cellulose of some type ( roots?) The other photos look like some sort of natural mineral in small veins. I'm sorry Reiner but you're wrong. If you don't know what vermicular Spinel is why not
look it up? http://www.alexstrekeisen.it/english/vulc/olivinexenocryst.php has nice
examples. The macle chain structure is very visible on many of my pictures.
I'm ressourceful, I'll find a way to get good enough pictures to prove it, even if no one
here helps. Sorry but your specimens do not look anything like the vermicular Spinel illustrated in the article. 
Olivier,
You show fibres in the air (so far I am still not at the point of denying they could be mineral fibres). But the illustrations in the article are fibres in solid mineral matter. Those would not likely weather out in 3-D relief, as what you show. Moreover, they are tightly packed, with multiple examples together. Lone fibres in air are not the same thing.
As an independent observation, you show what looks just like fibres from textiles or perhaps paper or insulation. I find the same sort of thing on most specimens I photograph, and I can manipulate them to clean them off before photography if I can do so without damaging delicate nearby minerals. And, if necessary, I use Photoshop to get rid of them in the photos because they are so distracting. So, now, using good judgment, I should say they are not mineral fibres.
We have to evaluate: Which do you think is more likely–individual loose fibres of materials adhering to mineral specimens that have spent time in soil, boxes, papers, or other wrapping material, or an obscure and exotic texture of tightly packed fibres around olivine grains within particular igneous rocks that have been displayed for us only in petrographic thin sections? please write me and I can send u some pictures of minerals wwalljr@triad.rr.com Vermicular Spinel is common in mantle Peridotite and that's exactly what these are.
Even on my crappy pictures it's so visible
LO5D and 5F look like allanite or some other thin tabular mineral? Have you had these tested? Just a few questions I see as needing answered.
1) How do you know the things are spinel - have they been analyzed?
2) The photos shown by Strekeisen are of thin sections, taken through a petrographic microscope, thus show different things than you will see in a "raw" specimen. Also, his "vermicular spinel" occurs with an orthopyroxene - is that also present in your samples?
3) And, if the specimens are of mantle peridotite, where were they collected from? Can give credence to your arguments. The lab I'm working with refuses to work on unpolished samples or else I would already
have a reading and a SEM image of this thing. For the rest it's Olivine and serpentinization
products, Pyrope, Spinel, Chromite
I tell you, it's not just fibers, sooner or later I'll find a way to get a picture good enough to
prove it conclusively. I also used the latest photo software and compared the blue color of
the known spinel to that of the presumed spinel filaments and oddities and it's a perfect match
I agree that the pictures on the website I have linked are not the best but that's the only
I could find to compare.
L18C looks convincing. If you want to prove vermicular spinel you will have to get a thin section made and some probe work done. I don't want to prove vermicular spinel, there is already strong indication that it is.
What I want is to see it better! Any reasonnable photomicrography setup will do
a better job than my ridiculous digital microscope. I don't care for a thin section
I want to see the 3D structure of it in color 
Sorry Olivier but your images are quite unlike any vermicular spinel I have seen, usually in very fine grained masses intergrown with orthopyroxene etc; you really need some analytical confirmation. A polished thin section to study the petrological relations and probe would be good.
