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Opal from
Festerling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Dragoon Mts, Cochise Co., Arizona, USA

Locality type:Mine
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
References
References:Rolf Luetcke
Specimen source:Personally collected
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Festerling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Dragoon Mts, Cochise Co., Arizona, USA
Nearest other occurrences of Opal
4.3km (2.7 miles) San Juan Mine (San Juan group; Gordon Mine; Mann adit; Sulphide adit; Silver adit), Gordon Camp, Middle Pass Mining District, Dragoon Mts, Cochise Co., Arizona, USA
5.6km (3.5 miles) Unnamed Cu-Ag prospect, Middle Pass Mining District, Dragoon Mts, Cochise Co., Arizona, USA
16.0km (10.0 miles) Last Chance Mine (1907 Mine), Casey Hill, Courtland, Turquoise Mining District (Courtland-Gleeson Mining District), Dragoon Mts, Cochise Co., Arizona, USA
16.1km (10.0 miles) Maid of Sunshine Mine, Turquoise Mining District (Courtland-Gleeson Mining District), Dragoon Mts, Cochise Co., Arizona, USA
20.7km (12.9 miles) Grand Central Mine, Contention-Grand Central Mine group, Tombstone Mining District, Tombstone Hills, Cochise Co., Arizona, USA
21.5km (13.4 miles) Lucky Cuss Mine (Escondido Mine; Escondido claims; McCann Mine; Wedge Mine), Tombstone Mining District, Tombstone Hills, Cochise Co., Arizona, USA
23.2km (14.4 miles) Unnamed W-Cu prospect, Dragoon, Cochise Mining District, Little Dragoon Mts, Cochise Co., Arizona, USA
24.7km (15.3 miles) Montezuma Mine, Tombstone Mining District, Tombstone Hills, Cochise Co., Arizona, USA
25.7km (16.0 miles) Curtis Diatomite deposit (Curtiss Diatomite deposit), Curtis, Cochise Co., Arizona, USA
25.8km (16.0 miles) Saint David area, Cochise Co., Arizona, USA
 
Mineral and/or Locality  
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