- Category
- Anthropogenic
- Color
- Dark blue with copper sparkle
- Hardness
- 5 to 6
- Luster
- Vitreous
- Cleavage
- N/A
- Fracture
- Conchoidal
- Streak
- N/A
- Transparency
- Opaque
- Location
- Zagreb
- Date
- 2023-12
Christmas advent calendar gift from M. and A.
Christmas advent calendar gift from M. and A.