 | Geology Rocks: Ulexite Demo I show a few of the samples in my rock collection and talk a bit about the interesting light transmission properties of Ulexite. It's sometimes called TV Rock or TV Stone because it acts like a fiber optic. It's kind of hard to capture on film, but a fun rock to play around with as you can see. |
 | Crystal Formation Crystallization of potassium chromate from solution by evaporation of water. This is a time lapse video of a droplet of solution as viewed under 20x power. |
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