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!
Calcite here occurs as rhombic, honey-yellow crystals in cavities and fissures, also as scalenohedral, colorless to white crystals associated with "blister copper" chalcopyrite.
Habit:
Scalenohedral; rhombic
Colour:
Honey-yellow, colorless to white.
Luminescent properties:
Golden-yellow (SW) (rhombic, honey-yellow crystals); pink (SW), white scalenohedral crystals.
Chimney Rock Quarry, Bridgewater Township, Somerset County, New Jersey, USA