 a pseudomorph ụgha ụdị bụ ịnweta nke na-ewe ụdị udi nke ọzọ ịnweta ma ọ bụ organic umi nihi okpomọkụ na ma ọ bụ nrụgide ma ọ bụ chemical usoro, eg, tiger anya quartz nnọchi nke crocidolite, ihe Asbestos ịnweta; osisi agate a quartz nnọchi nke osisi 