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Description |
This is a great example of the transparent and colorless Ulexite known as "TV rock" because it has optical properties like fiber-optic cable. It is transparent along the perfect vertical axis, while opaque along other axes. When polished, as this is, you can hold it over writing and witness this phenomenon. It does get sold widely to museums and rock shops, again labeled as "tv rock" or "fiber-optic rock." |
