12mo ago

Mindat.org open mineral database and reference

Found out about this website from today's Geology Hub uploaded on YT

https://www.youtube.com/watch?v=v75f530yFOY

This crystal doubles images, meaning that if you look through it that anything on the other side whether that be text, a person, or a photo of a volcano will appear to be doubled. But, why does this unusual optical property occur when utilizing a crystal of calcite? The answer is a fascinating phenomenon known as birefringence, which this video will explain through the expertise and analysis of a geologist.

This is the about-page of which text continues past the posted image on the left side:https://www.mindat.org/a/aboutmindatHere is the link to the discussion groups page pictured:https://www.mindat.org/discuss.php

And as a further aside, the image was made with an F-Droid app that is new to me but popped up 3 months ago apparently and has a lot of great features for stitching images and creating content:

https://f-droid.org/packages/ru.tech.imageresizershrinker

https://github.com/T8RIN/ImageToolbox