6A44.37 - Fiber Optics - Ulexite
The ulexite is sometimes called "TV Rock". It is a natural fiber optics matrix made up of sodium calcium borate crystals in a tubular arrangement.
- Victor E. Henrich, "Fiber Optic Imaging: Nature Beat Us To It", TPT, Vol. 56, #2, Feb. 2018, p. 128.
- Robert Ehrlich, "P.5. TV Rock (Ulexite)", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 180.
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