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!
Schooner (circa 1985) gives the best description: "Zoisite is very common in calc-silicate rock and amphibolite at the Strickland quarry. It is usually white or gray, but occasionally pale pink, forming veins through a mixture of hornblende and garnet. A number of samples have been X-rayed. Other associated minerals are ferroaxinite, anorthite, and fassaite. Just outside the western edge of the quarry, at the site of an old powder-shed dugout, much calc-silicate rock is composed mainly of green and brown clinopyroxene, with white zoisite. A few excellent crystals, embedded in quartz, have come from there."
Habit:
massive granular
Colour:
white to gray, pale pink
Quality for species:
Rock forming mineral/non-crystalline/little interest for collectors.(##)
