Granite pegmatite quarry about 10km from town of Tanti. The blue cobaltoan genthelvite from here, now widely distributed in collections, is not from the pegmatite body itself, but from a younger vein of friable specular hematite that cuts across the pegmatite body.
References:
- American Mineralogist (1978): 53: 416-431.
- Zeitschr. Krist.(1993): 208: 57-71.
- Canadian Mineralogist (1997): 35: 707-712.
- Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.
- Mr. Nelson Valenzuela.
Mineral List:65 entries listed. 63 valid minerals. 1 type locality (valid mineral).
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