Sudines says, that astrobolos[1] resembles the eye of a fish in
appearance, and that it has a radiant white refulgence when
viewed in the sun.
1. "Planet-stricken." It is not improbable that this was Cat's-eye, a
translucent Chalcedony, presenting a peculiar opalescence, or internal reflections,
when cut en cabochon. The colour is either bright-greenish grey,
or else yellow, red, or brownish.