UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 5, No. 14, pp. 225-233, Pis. 19-20 ANDREW C. LAWSON, Editor 



NOTES ON SOME CALIFORNIA MINERALS 



BY 



AETHUE S. EAKLE. 



CONTENTS. 



PAGE 



1. Linarite, Caledonite, Brochantite, ami Anglesite from the Cerro Gordo 



District, Inyo Co 225 



Linarite 225 



Caledonite 227 



Brochantite = 228 



Anglesite 230 



2. Celestite from San Bernardino Co 230 



3. Stibnite from Hollister, San Benito Co 231 



4. Enargite from Alpine Co 232 



5. Arcanite from Orange Co 232 



I. — Linarite, Caledonite, Brochantite, and Anglesite from 

 the Cerro Gordo District. Inyo County. 



Linarite. — The beautiful azure-blue linarite that was discov- 

 ered some years ago in the Cerro Gordo mine of Inyo county 

 occurs characteristically in diverging' and radiating aggregates 

 of thinly bladed crystals with their elongation parallel to the 

 6-axis. The blades are in general not separable and show only a 

 few imperfect dome faces. GJood crystals, however, are to he 

 found in the cavities of the white quartz and brown sulphate 

 matrix, intimately associated with green caledonite and brochan- 

 tite. A few of these crystals were measured for their forms, but 

 a more complete description of the mineralogy of this district is 

 reserved for a future report. The only previous measurements 



