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Trichroism | optics - Britannica
Trichroism, found in biaxial crystals (two optic axes). It can be observed only in coloured, doubly refracting crystals.
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www.britannica.com
TRICHROISM Definition & Meaning | Merriam-Webster Medical
The meaning of TRICHROISM is pleochroism in which the colors are unlike when a crystal is viewed in the direction of three different axes.
www.merriam-webster.com
www.merriam-webster.com
TRICHROISM Definition & Meaning - Dictionary.com
Trichroism: the condition when any given part exhibits three different colors in different individuals of the same species.
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www.dictionary.com
trichroism
trichroism (ˈtraɪkrəʊɪz(ə)m) [f. as prec. + -ism. Cf. F. trichroïsme.] The property of being trichroic: spec. a. Cryst.: see prec.1847 Webster cites Dana. 1860 in Mayne Expos. Lex. 1865–8 Watts Dict. Chem. III. 670 Some biaxial crystals exhibit trichroïsm; thus certain Brazilian topazes of a yellowi...
Oxford English Dictionary
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Trichroism and Red Flash in Tanzanite
Tanzanite is a trichroic gemstone. This means that Tanzanite's chemical structure causes the double refraction of white light as it passes through it.
www.theraregemstonecompany.com
www.theraregemstonecompany.com
TRICHROISM definition in American English - Collins Dictionary
noun the property that some crystals have of transmitting light of three different colors when looked at from three different directions.
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www.collinsdictionary.com
Grandidierite
While trichroism can usually help distinguish grandidierites from other gems, lazulites can occur with blue-green colors and show colorless/blue/dark blue
wikipedia.org
en.wikipedia.org
What is Gemstone Pleochroism? - International Gem Society
Pleochroism means "more colors." Pleochroic gems show two or three colors when viewed from different angles.
www.gemsociety.org
www.gemsociety.org
trichroism - VDict
Definition: "Trichroism" is a noun that describes a special property of certain crystals. It means that when you look at a crystal from three different ...
vdict.com
vdict.com
Definition of trichroism - Mindat
Characteristic of a crystal showing three different colours when rotated in polarised transmitted light; limited to crystallization in the orthorhombic, ...
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www.mindat.org
What is Trichroism in Tanzanite? - YouTube
https://www.theraregemstonecompany.com/tanzanite - This video explains Tanzanite's extraordinary and unique phenomenon of Trichroism - Learn ...
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www.youtube.com
trichromatic
trichromatic, a. (traɪkrəʊˈmætɪk) [f. Gr. τρι- tri- + χρωµατικός chromatic; Gr. has τριχρώµατος.] Having, showing, or pertaining to three colours; trichroic: spec. a. Optics. Having or relating to the three fundamental colour-sensations (red, green, violet) of normal vision. b. Applied to lithograph...
Oxford English Dictionary
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pleochroic
pleochroic, a. Cryst. (pliːəʊˈkrəʊɪk) [f. pleo-, pleio- + Gr. χρώς complexion, colour, -χρο-ος coloured + -ic: cf. dichroic.] Showing different colours when viewed in two or in three different directions (dichroic or trichroic), as certain double-refracting crystals. pleochroic halo, each of a serie...
Oxford English Dictionary
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Tanzanite
Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation.
wikipedia.org
en.wikipedia.org