Home > American Localities – September 25 > MS0792 Natroalunite
Natroalunite - Sold
- Mocalmo
- Mono County
- California
- U.S.A.
- 5.0 by 4.4 by 3.9 cm – Miniature specimen (fits into a 5 cm cube)
Natroalunite is a sodium aluminum sulfate (Hillebrand and Penfield, 1902). Typically the mineral is chalky and fine-grained, but not this piece! The bulk of this specimen is coarsely crystalline natroalunite, with a cavity lined with curved rhombohedral crystals to 3 mm. This specimen was part of the personal collection of Ralph Merrill, proprietor of the prolific mail order business Minerals Unlimited.
