| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Colorado > Microcline (Carlsbad-law twinned) |
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| DESCRIPTION: | No. 56451 |
| Mineral: | Microcline (Carlsbad-law twinned) |
| Locality: | Maroon Bells, Elk Mountains, southwest of Aspen, Pitkin County and Gunnison County, Colorado |
| Description: | Two interpenetrant microcline crystals that are twinned following the Carlsbad Law of feldspar twinning where the microcline crystals share a common plane of atoms running 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: | 4.5x3.5x1.8 cm |
| Crystals: | 46 mm |
| Archived: | For reference only |
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