Mica-Schist

Mica-Schist, Sekigawa（Ehime Pref.）: Field width = 8.8mm A caption is in the bottom. The Image is XPL on mouse to PPL
関川の白雲母片岩　横幅8.8mm．写真の下に説明．薄片写真：クロスポーラー（XPL)．マウスを乗せるとオープンポーラー（PPL)．

Sekigawa river("gawa" means a river in Japanese) is the one of the best place to collect metamorphic rocks and ultra-basic rocks on japan. There are a lot of kind of schists from "Sanbagawa Metamorphic belt in Shikoku Is.)
This sample contains beautiful muscovites under XPL and epidotes, which are high interference colorsunder XPL and high refraction indexes under PPL. Also, hornblendes are light green under PPL. No colors both PPL and XPL are quartz.
関川の雲母片岩．XPLで派手な色の細長い鉱物は白雲母．エピドート（緑簾石）はPPLで高い屈折率，XPLで派手な色調．角閃石はPPLで淡緑色，石英はXPL.PPLで無色