|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Montana > Quartz var. Smoky Quartz (Dauphiné Law Twins) on Microcline
|Quartz var. Smoky Quartz (Dauphiné Law Twins) on Microcline
|Butte District, Silver Bow County, Montana
|Lustrous transparent smoky quartz crystals, on blocky microcline crystals, with many complex suture patterns on the prism faces indicating the smoky quartz crystal is twinned following the Dauphiné Law of quartz twinning. Collected ca. 1985
|For reference only
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