Rocks! Thin ones...

Oct 17, 2013 20:30


I am now the proud owner of one of these:

Big photo I cannot be arsed to edit )

via ljapp

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Comments 13

eniel October 17 2013, 20:52:58 UTC
The second picture looks amazing! Can't seem to see the first one thought :(

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lanfykins October 17 2013, 20:58:59 UTC
Ah, the LJ app arsed that up to a fare-thee-well. Fixed now!

(Though I somehow think that taking photos down the eyepiece with a phone camera may not be the best way to illustrate the wonders of the petrological microscope :) )

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beckyc October 17 2013, 21:44:45 UTC
Some nice pleochroic haloes in that there biotite.

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lanfykins October 18 2013, 06:28:30 UTC
...now you're scaring me :)

Fortunately I was intending to spend the weekend learning to recognise rocks anyway...

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beckyc October 18 2013, 11:23:32 UTC
Do you have the S276 mineral identification cheat sheet?

...now you're scaring me :)

Awww, sorry. But do come back and see if you'd still say that* after your weekend learning rocks ;-).

*Biotite's one of the easy ones (in thin section and in hand specimen). Garnet's pretty easy to find too.

Then if you're in the field in Scotland, you spend ages going "are there any higher grade minerals" and unless there's a tutor there, decide everything is a garnet-mica schist ;-).

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beckyc October 18 2013, 11:27:53 UTC
(Which is not to imply that that looks like a garnet-mica schist. It's a bit hard to tell what it IS based on that one shot, without being able to rotate it or switch back and forth between x-polarised and plain polarised light)

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bateleur October 18 2013, 10:40:35 UTC
Ooh, shiny!

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