Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Commonly found as thin coatings on feldspar frozen in the mineralogically complex zone, and rarely as crystalline aggregates in miarolitic cavities with elbaite. Most of the "lepidolite" (none have been analyzed) from here is likely schernikite.
Habit:
Fibrous crystals with rhombic cross-section formed in parallel growths that resemble waxy columns.
Hewitt Gem Quarry, Haddam, Middlesex County, Connecticut, USA