Ulexite, sometimes known as TV rock or Television stone, is a mineral occurring in silky white rounded crystalline masses or in parallel fibers. The natural fibers of ulexite conduct light along their long axes, by internal reflection. Ulexite was named for the German chemist Georg Ludwig Ulex who first discovered it. Chemically, ulexite is a borate, whereas selenite (a variety of gypsum) is a sulfate. Ulexite can form fibrous aggregates with the single fibers in strictly parallel order. A piece of massive ulexite, sawn flat and polished perpendicular to the growth direction of the fibers, somewhat behaves like a fiber optic device: when you put it onto a printed page and look through, the letters will appear as if they were on the top surface of the ulexite piece. Dealers call this a ‘TV effect’. Backorders not accepted.
***Pieces will vary in clarity, size, shape and weight***
TV Rock (Ulexite)
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