Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
광물의 위형은 다른 광물의 형태를 모방할 수 있다.gwangmul-ui wihyeong-eun dareun gwangmul-ui hyeongtae-reul mobanghal su itda.The pseudomorph of a mineral can imitate the shape of another mineral.