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Robertson pit (Robertson Quarry), Dayton, Mason Co., Washington, USA



Detailed Mineral List:
Analcime
Formula: Na2(Al2Si4O12) · 2H2O
Habit: trapazohedra to 20mm in diameter
Colour: colorless (some with green chlorite inclusions); white
Reference: Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71
Photo: © Peter Hargis. Analcime from Robertson pit, Dayton, Mason Co., Washington, USA
Calcite
Formula: CaCO3
Colour: yellow
Reference: Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71
Photo: Calcite from Robertson pit, Dayton, Mason Co., Washington, USA
'Chabazite'
Reference: Tschernich, R. (1992): Zeolites of the World, 71
'Chlorite Group'
Colour: green (sometimes as inclusions in analcime)
Reference: Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Reference: Tschernich, R. (1992): Zeolites of the World, 71
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71
Photo: © John Sobolewski. Natrolite from Robertson pit, Dayton, Mason Co., Washington, USA
Pyrite
Formula: FeS2
Reference: Rocks & Min.: 63:24-28; Tschernich, R. (1992): Zeolites of the World, 71


7 entries listed. 5 valid minerals.

References

Rocks & Minerals (1988): 63: 24-28.

Tschernich, R. (1992): Zeolites of the World: 71.

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