AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Colorado > Microcline (intersecting Carlsbad-law twins)

Microcline (intersecting Carlsbad-law twins) from Maroon Bells, Elk Mountains, southwest of Aspen, Pitkin County and Gunnison County, Colorado

DESCRIPTION:	No. 61621
Mineral:	Microcline (intersecting Carlsbad-law twins)
Locality:	Maroon Bells, Elk Mountains, southwest of Aspen, Pitkin County and Gunnison County, Colorado
Description:	A 40 mm microcline crystal intersecting two interpenetrant microcline crystals that are twinned following the Carlsbad Law of feldspar twinning where the twin plane runs along the C-axis. These crystals were phenocrysts that weathered out of granite. Ex. Thomas A. Penney (1934-2019) collection, collected in the 1970s by his son
Overall Size:	4.5x4.5x3.5 cm
Crystals:	40-45 mm
Archived:	For reference only

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