Breccia zones in granodiorite along the Middle Fork Snoqualmie River. Filed by Bear Creek Mining in the 1950's, Spruce was part of a group of 170 claims held for exploration of a large, deep-seated Cu porphry. Worked for specimens by What on Earth, Inc., Ohio in 1977 & 78; Bob Jackson, Stan Esbenshade, and Neil Pfaff 1979- 82, & Geology Adventures, Inc. from 1983 to present. Patented in 2001, mineral rights now held by Spruce Collectors, LLC, a membership organization.
Mineral List
19 entries listed. 14 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please
register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
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References
Cannon, B. (1975): Minerals of Washington: 45, 54, 140, 145.
Medici, J., Ludlum, N., Pfaff, N. & Hawes, W. (1978): Quartz & Pyrite from King County, Washington. Mineralogical Record. 9: 349-358
Lasmanis, R. (1991): Rocks & Minerals: 66(4): 316 - 320.
Ream, L. (1994): Gems and Minerals of Washington.
Jackson, B. (2008): American Mineral Treasures: 328 - 335.
External Links
Mineral and Locality Search
