Howieite and Deerite
UNB-2017-0024Minerals » Howieite-Deerite Group
Description
Two samples. Howieite is small black needle-like crystals and Deerite is larger black prismatic crystals.
Howieite (Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10)
Deerite (Fe6Fe3(Si6O17)O3(OH)5)
Howieite is black in colour. It hast thin black needles in radial and divergent sprays crystals.
Deerite is black in colour and has monoclinic-prismatic crystals. It is found meta-ironstones and Cu-Fe sulphide deposits, in blueschist facies metasediments formed at high pressure and low temperature.
http://www.dakotamatrix.com/products/4346/howeite
http://webmineral.com/data/Deerite.shtml#.WKXZs28rKUk
Specifications
| Object name | Howieite and Deerite |
|---|---|
| ID | UNB-2017-0024 |
| Legal status | Permanent collection |
| Category | Mineral |
| Classification | Mineral group: Howieite-Deerite Group |
| Origin | Laytonville, California, U.S.A. |
| Pieces | 1 |
| Partial | No |
| Measurements |
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