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Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine), New Idria District, San Benito Co., California, USA

A gemstone and specimen mine located near Santa Rita Peak at the headwaters of the San Benito River and New Idria. Mineralization is natrolite veins cutting a glaucophane schist inclusion in a serpentinite body.

Note: The majority of specimens from this locality have been prepared by dissolving away the enclosing natrolite with hydrochloric acid.

Ref:
- Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. The Mineralogical Record 8, 442-452
- Wise, W.S. & Pabst, A. (1977): Jonesite a new mineral from the Benitoite Gem mine, San Benito County, California. The Mineralogical Record 8, 453-456





Map Reference: 36°20'10"N , 120°36'19"W

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Mineral List:
  • Actinolite
  • Aegirine
  • Albite
  • Analcime
  • Andradite
    var: Melanite
  • 'Apatite'
  • Aragonite
  • Baotite
  • Bario-orthojoaquinite (TL)
  • Barioperovskite (TL)
  • Benitoite (TL)
  • Calcite
  • Chalcocite
  • 'Chlorite Group'
  • Chrysotile
  • Crossite
  • Digenite
  • Diopside
  • Djurleite
  • Fresnoite
  • Glaucophane
  • Joaquinite-(Ce) (TL)
  • Jonesite (TL)
  • Natrolite
  • Neptunite
  • Orthojoaquinite-(Ce) (TL)
  • Perovskite
  • Pyrite
  • Sérandite
  • Silver
  • Vesuvianite


    31 entries listed. 27 valid minerals. 6 type localities (valid minerals).

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