|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude:||24° North , 105° West (est.)|
|Margin of Error:||~186km|
|Name(s) in local language(s):||José María Patoni (Menores de Arriba), San Juan del Río, Durango, México|
|Other/historical names associated with this locality:||Mina La Mosca|
These mining works are famous worldwide for the purity, transparence and crystallographic complexity of its calcite crystals. These specimens were formed by mineral rich hydrothermal fluids flowing through rhyolitic pyroclastic materials, where they found faults and fissures, a perfect place to grow. Fluorescent under long-wave UV
1 valid mineral.
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Mineralien Welt (2005): 16(2) (March-April): 48.