This picture is taken with a polarizing microscope. Here is the thin section foidolite (rock). In the foreground is a large yellow sodium pyroxene grain surrounded by fine grains.
<a href="//commons.wikimedia.org/w/index.php?title=User:Elena_manul&amp;action=edit&amp;redlink=1" class="new" title="User:Elena manul (page does not exist)">Elena manul</a>
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<span class="int-own-work" lang="en">Own work</span>