Polariscope-use properties of light gems that resemble the way the light refraction (Refraction Single, SR) to light refraction (Double Refraction, DR), or a ploy that did not clearly show how light (Aggregate, AGG), which is the appearance of weightlessness that consists of a group of tiny crystals together. It has a mass of flesh or heal the appearance of weightlessness refraction light shows like the single, but the ploy of refraction (Anomalous Double Refraction, ADR) also use this tool to check the color properties (pleochroism) and the image circle (interference figure).
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