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 is quite common at the Tylden quarry forming as attractive, translucent, bluish grey rhombohedral interpenetrating crystals lining cavities in the basalt. White globular calcite spheres up to 1.5 cm occur also at Tylden."
Tylden quarry, Tylden, Macedon Ranges Shire, Victoria, Australia