This is Terbium Gallium Garnet, an exotic material grown for high-end crystal tech. It's one of the only gems you can pick up with a magnet. And that's not even the weirdest thing about it. When it's exposed to a magnetic field, any light that passes through it gets rotated. You can see the effect by putting one between two polarizing filters and t
The video shows a close-up of a person's hands meticulously polishing a light blue gemstone. The gemstone is mounted on a tool and is being shaped and smoothed on a polishing machine. The process involves careful manipulation and attention to detail, resulting in a faceted gem. The final shot displays the polished gemstone held between two fingers,
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