AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Colorado > Quartz var. Smoky Quartz (doubly terminated Dauphiné Law twins)

Quartz var. Smoky Quartz (doubly terminated Dauphiné Law twins) from Devil's Head, Rampart Range, 25 km southwest of Castle Rock, Douglas County, Colorado

DESCRIPTION:	No. 76318
Mineral:	Quartz var. Smoky Quartz (doubly terminated Dauphiné Law twins)
Locality:	Devil's Head, Rampart Range, 25 km southwest of Castle Rock, Douglas County, Colorado
Description:	Lustrous doubly-terminated transparent smoky quartz crystals with complex suture patterns on the prism faces, indicative of twinning following the Dauphiné Law of quartz twinning. The lower termination is composed of many smaller parallel faces. Collected ca. 1992
Overall Size:	9.5x3.5x2.5 cm
Crystals:	95 mm
Archived:	For reference only

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