Dims: 0.46x0.38x0.26" (1.18x0.96x0.65cm)
Wt: 3.5ct (0.7g)
Espirito Santo, Brazil
This is a shard (fragment) of an iolite crystal. There is no indication of crystal form, other than the well-defined pleochroism which identifies the crystal axes. The surface is all fractures, and thus is rough and hides the transparency of the iolite, which I believe is excellent. The pleochroism is strong, violet in one direction, pale yellow in another, and a faint gray-violet in a third.