Mineral: Feldspar group
Locality: Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
Dimensions: 7.6 x 5.6 x 2.5 cm

Description: Pale tan microcline host with intergrowths of lighter-colored albite lamellae coursing through the microcline groundmass. This variety of feldspar is known as perthite.

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