youtor.org
Kyanite tutorial Optical mineralogy
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Video Source: www.youtube.com/watch?v=TN5mCmknrc4
Several videos of kyanite in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation. • Key characteristics: high relief, good prism-parallel cleavage, short fat cross parting, low interference colors, undulose (sweeping) extinction when deformed. • 00:00 Well-developed cleavage and cross-parting • 00:31 In eclogite, weaker cleavage and parting • 01:01 Numerous crystals in different orientations • 01:32 Slightly pleochroic yellow, abundant cleavages • 02:03 Deformed grain • 02:34 Adjacent to fibrolitic sillimanite
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