-
cannot exhibit pleochroism.
Tourmaline is
notable for
exhibiting strong pleochroism. Gems are
sometimes cut and set
either to
display pleochroism or to hide...
- the
United States are
required to be
disclosed at the
point of sale.
Pleochroism has a
physical property in
which the
gemstone will
appear to have multiple...
- word
meaning "two-colored rock", a
reference to cordierite's
strong pleochroism. It has also been
called "water-sapphire" and "Vikings' Comp****" because...
- Mg) to
grandidierite (Mg, Fe).
Grandidierites display strong trichroic pleochroism. That
means that it can show
three different colors depending on the...
-
characteristic shade of yellowish-green or pistachio-green. It
displays strong pleochroism, the
pleochroic colors being usually green,
yellow and brown. Clinozoisite...
-
increase with
increasing oxidation, the
birefringence decreases, and the
pleochroism on {010}
becomes stronger. The
angle between the
optic axes, 2V, has...
- or radiohalo, is a microscopic,
spherical s**** of
discolouration (
pleochroism)
within minerals such as
biotite that
occurs in
granite and
other igneous...
- such as
straight extinction, much
weaker double refraction and
stronger pleochroism. They also have a
prismatic cleavage that is
perfect in two directions...
-
microscope include colour,
colour variation under plane polarised light (
pleochroism,
produced by the
lower Nicol prism, or more
recently polarising films)...
-
Galleries Faye, G. H.; Nickel, E. H. (1969). "On the
origin of
colour and
pleochroism of kyanite" (PDF). The
Canadian Mineralogist. 10: 35–46.
Wikimedia Commons...
