Mineralpedia Details for Macdonaldite
Macdonaldite
- Formula
- BaCa4Si16O36(OH)2ยท10H2O
- Crystal System
- Orthorhombic
- Crystal Habit
- Acicular
- Cleavage
- Perfect, Good, Indistinct
- Luster
- Vitreous - Silky
- Color
- colorless, white
- Streak
- white
- Class
- Orthorhombic - Dipyramidal
- Hardness
- 3.5-4
- WebMineral
- View Macdonaldite
- Mindat
- View Macdonaldite
Macdonaldite from Esquire #8 claim, Big Creek, Fresno Co., California, United States
- Special Info
- Type Locality
Brown veins of Pellyite with white acicular and silky groups of Macdonaldite. Macdonaldite is a rather rare barium silicate found only in Italy and California. This being the Type Locality. This can be considered a good specimen.
Click thumbnail images for larger view.
Macdonaldite from Big Creek, Fresno Co., California, United States
- Special Info
- Type Locality
A small specimen from Big Creek, the type locality. Acicular radiating sprays to about 1mm.
Click thumbnail images for larger view.
Macdonaldite from Esquire #1 claim, Rush Creek, Fresno Co., California, United States
- Special Info
- Type Locality
A superb specimen of glassy, white, acicular Macdonaldite in divergent sprays to 5mm.
Click thumbnail images for larger view.
