Gahnite with Pyrite
SOLD
Gahnite with Pyrite
- Sold
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- Availability
- Sold
- Size
- 6.5 x 4 x 4.5 cm - Sm Cabinet
- Formula
- ZnAl2O4 (RRUFF)
- Locality
- Davis Pyrite mine, Rowe, Franklin Co., Massachusetts, United States
This may look like a homely specimen, and it is, but it comes with an old label with the date written as 3/23/34. The Davis Pyrite mine was a of stratabound massive sulfide deposit. They are dark bluish black and form crude stepped octahedral crystals, which are roughed up a bit. They are also hard, about 7.5, as it should be since it is a spinel with zinc. The matrix is mostly Pyrite and Quartz. See the prov. tab for a scan of the label. You should probably own a piece of history.
Gahnite
- Formula
- ZnAl2O4
- Crystal System
- Isometric
- Crystal Habit
- Euhedral Crystals, Massive - Granular, Striated
- Cleavage
- Indistinct, None, None
- Luster
- Vitreous (Glassy)
- Color
- bluish green, grayish green, deep leek green, greenish black, bluish black
- Streak
- gray
- Class
- Isometric - Hexoctahedral
- Fracture
- Uneven
- Hardness
- 8
Data courtesy of Webmineral.
- Collection
- Phillips Collection
- Mineralpedia
- View Gahnite
- On Dakota Matrix
- Previously Sold Gahnite
- On Dakota Matrix
- Other Available Gahnite
- WebMineral
- View Gahnite
- Mindat
- View Gahnite
