Mineral: Eastonite
Locality: C. K. Williams & Co. Quarry, Chestnut Hill, Easton, Northampton County, Pennsylvania, USA
Dimensions: 9.5 x 11.0 cm

Description: Eastonite was once classified as a variety of phlogopite, but is now considered a valid species. The C. K. Williams Quarry is the type locality for this greenish-yellow mica.

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