Ulexite is an ore of boron, and is studied in regard to its unique optical properties. “TV Stone” Also know as Television Stone, from Boron, California occurring in thin, parallel, sheet like fibers. When polished at the top and bottom, each tiny fiber transmits light through the specimen, causing anything under the specimen to appear as if it is at the top. Ulexite is highly popular as a specimen among mineral collectors.
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