In other words, the interference figure presents all possible birefringence colours for the mineral at once.
2.
Hagendorfite's optic sign, which is negative, is proven by examining its interference figure.
3.
Interference figures yield addition on the concave side of the isogyers, causing ulexite to be biaxial positive.
4.
Viewing the interference figure is a foolproof way to determine if a mineral is optically uniaxial or biaxial.
5.
Bertrand lenses find use in creating interference figures and assisting in aligning a microscope to generate interference figures.
6.
Bertrand lenses find use in creating interference figures and assisting in aligning a microscope to generate interference figures.
7.
Possible interference figures for a biaxial mineral with a large 2V, viewed along one of its two optic axes.
8.
The successive propagation of the wave results in the formation of the interference figure on the final screen " F ".
9.
To observe the interference figure, true petrographic microscopes usually include an accessory called a Bertrand lens, which focuses and enlarges the figure.
10.
Under the petrographic microscope, a thin section of the mineral will display brilliant interference figures in greens or blues ( Moore, 1971 ).
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