<figure class="wp-block-image">
 <img alt="QuartzFoldscopePolarizing" class="wp-image-168942 gcloudimg" data-attachment-id="168942" data-comments-opened="1" data-image-meta='{"aperture":"2.2","credit":"","camera":"iPhone SE","caption":"","created_timestamp":"1567004024","copyright":"","focal_length":"4.15","iso":"200","shutter_speed":"0.058823529411765","title":"","orientation":"0"}' data-image-title="QuartzFoldscopePolarizing" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_168941/QuartzFoldscopePolarizing.jpg"/>
 <figcaption>
  This picture of a quartz crystal, which looks like a smiling prehistoric fish or dog, was taken with polarizing plates crossed.  The crystal is from Bancroft, the crystal mining capital of Canada.
 </figcaption>
</figure>
<figure class="wp-block-image">
 <img alt="QuartzFoldscopecrystal" class="wp-image-168943 gcloudimg" data-attachment-id="168943" data-comments-opened="1" data-image-meta='{"aperture":"2.2","credit":"","camera":"iPhone SE","caption":"","created_timestamp":"1567004032","copyright":"","focal_length":"4.15","iso":"200","shutter_speed":"0.066666666666667","title":"","orientation":"0"}' data-image-title="QuartzFoldscopecrystal" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_168941/QuartzFoldscopecrystal.jpg"/>
 <figcaption>
  Here is the same crystal without the polarizing.
 </figcaption>
</figure>


Quartz under polarizing light

Puchina | Sat, Aug 31, 2019, 1:00 PM

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Foldscope Lens Magnification

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