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Massive Natrojarosite

The Mineral natrojarosite

Chemical Formula NaFe3+3(SO4)2(OH)6
Composition Basic hydrous sodium iron sulfate
Color Yellow-brown to brown
Streak Light yellow
Hardness 3 - 3.5
Crystal System Hexagonal
Crystal Forms
and Aggregates
Only in very small crystals, which are hexagonal or triangular shaped, and may also be tabular or pseudocubic. Also grainy, as fibrous crusts, in nodules, and in thin, hexagonal scales.
Transparency Translucent
Specific Gravity 3.1 - 3.3
Luster Resinous to adamantine
Cleavage 2,1 - basal (usually cannot be determined)
Fracture Conchoidal, uneven
Tenacity Brittle
In Group Sulfates; Hydrous Sulfates
Striking Features Crystal habits and color
Environment As a secondary mineral that forms through weathering in arid regions.
Rock Type Sedimentary, Metamorphic
Popularity (1-4) 3
Prevalence (1-3) 3
Demand (1-3) 3

Natrojarosite AUCTIONS

Natrojarosite has been found in Lavrion, Greece; the Francon Quarry, Montreal, Quebec, Canada; Rapid Creek area, Yukon Territory, Canada; and Palos Verdes Hills, Los Angeles Co., California.

Goethite, Pyrite, Galena, Barite

Natrojarosite's crystal forms combined with its color easily identify it. However, poorly crystallized examples and massive forms of Natrojarosite may be difficult to distinguish from other minerals, such as Limonite. Natrojarosite is also indistinguishable from its isomorphous mineral Jarosite by ordinary methods.

natrojarosite PHOTOS
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