Figure 1.13 | Is this mystery mineral amphibole or pyroxene? Source: Karla Panchuk (2020) CC BY-SA 4.0. Photo by Jan Helebrant (2015) CC BY-SA 2.0. view source
Are the two directions of cleavage at right angles to each other?
- No
- Yes
This mineral is:
- Amphibole
- Pyroxene