| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Montana > Microcline (Baveno Law Twin) |
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| DESCRIPTION: | No. 69881 |
| Mineral: | Microcline (Baveno Law Twin) |
| Locality: | Homestake Pass, Whiskey Gulch, 15.5 km southeast of Butte, Jefferson County, Montana |
| Description: | Large prismatic white microcline crystal with tan-colored etched outer surfaces. The microcline crystal is twinned following the Baveno Law of feldspar twinning with the twin plane running diagonally through the center and down the prism faces. Ex. John Geiges collection #614, acquired in 1999 from Roger Hoek |
| Overall Size: | 9.5x3x2.5 cm |
| Crystals: | 95 mm |
| Archived: | For reference only |
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