Blue curve: a spectrum,
Red curve: g spectrum.
Red curve close to a spectrum.
Blue curve = b spectrum.
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This page summarize the pleochroism of glaucophane family. The 3 small crystals sections are about 90° from each other: left crystal is purple-blue (g-b), the center one is no color-violet (a-g) and the crystal to the right is no color-blue (a-b). |
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Spectra of the small crystal to the left of the pictures above (size about 400 µ). |
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Spectra of the center crystal.
Blue curve: a spectrum, Red curve: g spectrum. |
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Spectra of the crystal to the right.
Red curve close to a spectrum. Blue curve = b spectrum. |