|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Colorado > Quartz var. Smoky Quartz (Dauphiné Law twins) with Goethite pseudomorph after Siderite
|Quartz var. Smoky Quartz (Dauphiné Law twins) with Goethite pseudomorph after Siderite
|Lake George District, Park County, Colorado
|Lustrous tapered transparent smoky quartz crystal with complex suture patterns on the prism faces, indicative of twinning following the Dauphiné Law of quartz twinning, with brown goethite pseudomorph after 16 mm rhombic siderite crystal on one edge. Collected ca. 1992
|For reference only
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