"Blocky crystals of orthoclase line miarolitic cavities, but have often grown across the cavities and are poorly or non terminated. They are usually white to cream and perthitic, with the sodic phase often etched out leaving a skeletal structure. The crystals commonly show Carlsbad twinning. Large blocky terminated crystals measuring up to 10 x 11x 12cm have been collected."
Lake Boga granite quarry, Lake Boga, Swan Hill Rural City, Victoria, Australia