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!
Granular pink to tan aggregates, with poor crystals in vugs in altered lithiophilite with hureaulite, hydroxylapatite and groutite. Masses up to 4 inches have been reported. Such rhodochrosite grades into siderite. Rarely, little bright pink cleavages have been seen with lithiophilite. An overgrowth on yellow calcite is a unique item. In a single instance, 1/8 inch euhedral deep pink crystals were found in a vug of albite.
Habit:
microcrystalline rhombs and scalenohedrons
Colour:
pale pink to brownish white
Quality for species:
Poor for species, only of interest for locality collectors. (#)
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA