[Rockhounds] funky feldpsar and micro kyanite photos
DonH
donhalterman at verizon.net
Sun Jul 15 22:01:34 PDT 2007
Howdy,
This is what happens when the earth has a bad tummy and hurls up before
the magma is properly digested.
http://mysite.verizon.net/resqkdq4/messy-feldspar.jpg
I was looking for nice clean feldspars to analyze and came across this
in a thin section. These complex crystals are all around us, often in
road gravel, but must be seen under magnification and with crossed
polarizers. This is a wonderful mix of minerals but all the inclusions
and lack of equilibrium mean there is no way I can analyze the crystal
and get anything meaningful. Scope: Meiji RZ with ring light with Nikon
Coolpix 5000 on trinoc with Leitz Periplan 10x/18 eyepiece; closeup mode
with FINE detail; thin section between crossed polarizers, width of xtal
~3mm.
This shot makes me miss film. It looked good on the preview monitor,
but the white balance was all screwed up when I viewed the photo, and
this was the best correction I could do in a few minutes. You can see
the shape well, but the color is a little washed out and the highlights
are too bright. Same setup, mag. 50x, with iris stopped down to enhance
depth of field.
http://mysite.verizon.net/resqkdq4/tiny-kyanite.jpg
Don
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