Tremolite Asbestos
Transmitted Oblque Darkfield Dispersion Staining, Single Polarizing Filter Parallel to Length

The D-line refractive index along the length of this sample of tremolite asbestos is about 1.623. It matches the
refractive index of the Cargille High Dispersion 1.605 liquid at a wavelength of about 440 nanometers. At this
wavelength the Cargille liquid has a refractive index of about 1.635, as does the tremolite. This Type of Dispersion
Staining produces a single color for any given wavelength match between a given liquid and solid with a fixed single
linear polarizing filter. Oblque condensor darkfield dispersion staining produces the same colors as objective cental
stop dispersion staining but the particles are in much better focus. As a result it is easier to see the particles that
are producing the effect.