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opticalid - Birefringence Twinning Extinction angle Sign of...

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Worksheet for Optical Identification of Minerals Sample #: Name: Properties in plane polarized light: Color: Pleochroism: Shape and Form: Cleavage: Cleavage angle(s): Relief: relative to balsam or epoxy: Twinkling: Properties under crossed polars: Interference colors*
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Unformatted text preview: * : Birefringence: Twinning: Extinction angle: Sign of elongation: Conoscopic properties: Interference figure type: Optic sign: Optic angle (2V): Dispersion: * Non-diagnostic property. For training purposes only!...
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