idiomorphic
/ˌɪdiəˈmɔrfɪk/
adjective
- Having its own characteristic shape or form; used especially in geology to describe mineral crystals that have developed their natural crystal faces.
- Under the microscope, the idiomorphic garnet showed perfect hexagonal faces.
- Geologists often identify idiomorphic minerals by their well-defined geometric shapes.
- The idiomorphic quartz crystals stood out clearly in the rock sample.