KAl3(SO4)2(OH)6
Alunite is widespread but is rare as crystals, usually occurring as chalky masses that can exhibit a range of colours.
Selected Australian Occurrences:
- As grey to purple masses at Alum Mountain, Bulahdelah, New South Wales.
- Rarely as green masses at Mineral Hill, New South Wales.
- As sharp well-formed yellow pseudocubic crystals at Iron Monarch, South Australia.
- As white chalky masses in quartz at Tom’s Quarry, Kapunda, South Australia.
- As white chalky masses at Anglesea, Victoria.
