Mineralpedia Details for Englishite
Englishite
Named in honor of George Letchworth English, who was an American mineral dealer and collector from New York City, New York, USA. Englishite can be found only in the United States in three states: in Little Green Monster mine at the type locality in Clay Canyon, Utah, in Nevada at the Meikle, Carlin, Gold Quarry, and Redhouse mines in Nevada, and here in the Black Hills of South Dakota in the Tip Top mine. Englishite occurs in variscite nodules in the Little Green Monster mine, and in the complex granite pegmatite at the Tip Top mine.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/englishite.pdf
- Formula
- K3Na2Ca10Al15(OH)7(PO4)21ยท26H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Micaceous, Aggregates, Friable
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- colorless, white
- Streak
- white
- Class
- Monoclinic - Sphenoidal
- Hardness
- 3
- WebMineral
- View Englishite
- Mindat
- View Englishite
Englishite from Tip Top mine, Custer Co., South Dakota, United States
Englishite "balls" to about 0.75mm and sprays of clear Montgomeryite to 2mm and deep green Roscherite. Beryl matrix.
Englishite from Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States
Cluster of platy bluish Englishite 2mm in a cavity associated with the typical nodular assemblage of Wardite and Crandallite etc.
