A natural dark reddish brown to yellowish green tourmaline crystal with modified basal termination; from the Lookout mine (Upper Hercules), Hatfield Creek, Ramona, San Diego County, California, USA.
Specimen measures approximately 22x16x15mm. San Diego Mining Company, Hercules dike main trench, circa March 1997.
Specimen measures approximately 22x16x15mm. San Diego Mining Company, Hercules dike main trench, circa March 1997.
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