Calcite 日本冰洲石(方解石)
(最新物質) It is used to explain Normal beam follows the law of refraction and the abnormal beam does not follow the law of refraction. When the light goes through this Calcite, you can see the 2 courses of beam just mentioned above. Size : 35 x 20 x 17 mm L x W x thickness
Item No : JP 115-850