| | Description | |
| Habit: | large prisms to 6cm; rock forming masses | | Colour: | Black | | Quality of samples: | Good crystals or rich for species - important (!) | | Rarity at site: | Very common | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Micro Probe Volume VI Number 8; Rocks and Minerals, 66:6, p. 453; Cannon, B. (1975): Minerals of Washington, p.49; American Mineralogist, V.58, p. 874 | | Associated minerals: | |
| Associates: | Aegirine
Goethite
Microcline
Okanoganite-(Y)
Quartz
Zektzerite
| | Data | |
| Mineral Data: | Click here to view Arfvedsonite data | | Locality Data: | Click here to view Washington Pass, Golden Horn Batholith, Okanogan Co., Washington, USA | | Photo Gallery | View Gallery (5 photos) |
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