pseudomorphous
/ˌsuːdəˈmɔːrfəs/
adjective
- Having a false or deceptive form; describing a mineral that has the outward shape of another mineral but a different internal composition.
- Pseudomorphous crystals are often mistaken for the original mineral by amateur collectors.
- The rock contained pseudomorphous formations that puzzled the geology students.
- The pseudomorphous specimen looked like a perfect garnet but was actually made of chlorite.