the phenomenon of different colors appearing when certain crystals are viewed from different directions
例句
Pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions. 某些晶体在沿三种不同的方向观看时，而呈现三种不同的颜色的现象。
Pleochroism of a crystal so that it exhibits two different colors when viewed from two different directions. 某些晶体在沿两种不同的方向观看时，而呈现两种不同的颜色的现象。
Pleochroism: distinct in strong colored gem varieties, kunzite is violet-purple/colorless and hiddenite is green to blue-green/colorless to pale green. 晶体多样色性：不同类的锂辉石具有明显的强烈颜色，紫锂辉石具有紫罗兰色到紫色或者无色，希登石是绿色到蓝绿色或者无色到淡绿色；
of or relating to or having pleochroism. 属于、关于或有多向色性的。
When cutting most pleochroic gemstones (Iolite, Tanzanite, Kunzite etc.), lapidaries typically try to minimize the pleochroism and maximize the single most prominent color. 在切割大多数的多向色性类宝石时（如堇青石、坦桑宝石、紫锂辉石等），通常宝石匠会尽量缩小多向色性并最大化地将某一主色凸显出来。
PLEOCHROISM AND PLEOCHROISM'S FORMATION MECHANISM OF GEM QUALITY CORUNDUM 刚玉族宝石的多色性及形成机理
