Glass: transparent.
Calcite: transparent and birefringent (double refraction).
Ulexite: not transparent; the image is transmitted to the surface of the polished fifrous specimen ("tv rock") from Boron, Kern Co., California, USA.
A T H E N A |
Glass: transparent.
Calcite: transparent and birefringent (double refraction).
Ulexite: not transparent; the image is transmitted to the surface of the polished fifrous specimen ("tv rock") from Boron, Kern Co., California, USA.