Cacoxenite
Mineral Fe3+24AlO6(PO4)17(OH)12·75H2O
Take care.
- Fragile: Handle it gently and pack it well; it breaks or crumbles easily.
About it
Golden-yellow tufts and sprays of fine needles on limonite, often with wavellite in Arkansas. Also seen as golden inclusions in Brazilian amethyst sold as "Super Seven".
- Type
- Mineral
- Group
- Phosphate
- Formula
- Fe3+24AlO6(PO4)17(OH)12·75H2O
- Hardness (Mohs)
- 3–4
- Specific gravity
- 2.2–2.4
- Streak
- pale yellow
- Lustre
- silky
- Crystal system
- Hexagonal
- Colours
- golden yellow, yellowish brown, orange-brown
- Transparency
- translucent
- Cleavage and fracture
- none seen; fine radiating needles
Typical values: real specimens vary. For more, see mindat.org.