- Category
- Silicate
- Color
- Grey
- Hardness
- 6 to 6.5
- Luster
- Vitreous
- Cleavage
- Perfect
- Fracture
- Uneven
- Streak
- White
- Transparency
- Translucent
- Location
- Zagreb
- Date
- 2024-12
Christmas advent calendar gift from M. and A.
Christmas advent calendar gift from M. and A.