Purple jade (= finely-crystalline jadeite-K-feldspar-lawsonite-aegerine metamorphite) (10.2 cm across at its widest) - blueschist facies metaphonolite from Bursa Province (probably near Akpinar in southern Bursa Province), northwestern Turkey.

Purple or lavender-colored jade is very rare. Such rocks are known from Burma, Turkey, and parts of Central America. Purple jade from Turkey is a polymineralic metamorphic rock with a complex origin. Published research indicates that this material was originally Paleozoic- or Mesozoic-aged phonolite lava, an alkaline, intermediate, extrusive igneous rock. During the Late Cretaceous, at about 80 Ma, blueschist facies metamorphism (= high-pressure, low-temperature) altered the phonolites into rocks dominated by jadeite pyroxene, potassium feldspar, lawsonite, and aegerine pyroxene, with minor monazite, phengite, and secondary sericite.