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Pleochroism is an
optical phenomenon in
which a
substance has
different colors when
observed at
different angles,
especially with
polarized light. The...
- near the
Mererani Hills.
Tanzanite is
noted for its
remarkably strong trichroism,
appearing alternately blue,
violet and
burgundy depending on crystal...
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Optical properties biaxial positive Refractive index 1.69–1.70
Birefringence 0.006–0.018
Pleochroism Present,
dichroism or
trichroism depending on color....
- monochromatic, monochrome, photochromism, pleochroism, polychromatic, polychrome,
trichroism, trichromatic,
trichromic chron- time Gr**** χρόνος (khrónos) anachronism...
- blue-green,
colorless (sometimes a very
light yellow), or dark green.
While trichroism can
usually help
distinguish grandidierites from
other gems, lazulites...
- monochromatic, monochrome, photochromism, pleochroism, polychromatic, polychrome,
trichroism, trichromatic,
trichromic chron- time Gr**** χρόνος (khrónos) anachronism...
-
mineral easy to identify.
Transparent specimens are
noted for
their strong trichroism, the
three colours presented being dependent on body colour.
Owing to...
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Refractive index 1.665 to 1.712
Birefringence 0.036 to 0.042
Pleochroism Trichroism: green,
light brown, dark
brown 2V
angle 56°
Dispersion 0.018 Ultraviolet...
- (Cambodia)
Callistomimus suturalis (Fleutiaux, 1887) (Vietnam)
Callistomimus trichros Andrewes, 1936 (Indonesia)
Callistomimus tumidipes Britton, 1937 (Ivory...
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effects can be much more
dramatic under polarized light.
Dichroism and
trichroism are both
types of pleochroism. The term
dichroism is used to describe...
