This first image is a Zerene stack of four different points in the rotation of the polarizer at the light source. If you are familiar with cross-polarization, you have found that some regions of the specimen go flat while others sparkle.
Also, these panoramic images I make are not crops but stitches of two or more images. I do this because they better express the beauty of the crystals.
Sodium thiosulfate
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Sodium thiosulfate
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA