| | Book (edition) | Leigh McDonald Co\·er photo: \\ 7 ulfenite, Rowley Mine, Maricopa County, 4 cm high specimen, Evan and Melissa...material was cut parallel to the grain. The Blue Ball Mine, in Gila County, has produced thousands of azurite...quantity of this material came from the United Verde Mine at Jerome, GEMSTONES ANDLAPIDARYMATERIALS OF ARIZONA...Gila County. The Keystone Mine, the Inspiration Mine, and the Old Dominion Mine have all produced good gem-quality...the following about the material from the Keystone Mine: "It varies in color from bright to pale blue, bluish-green |
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