QUA5750 - QUARTZ var. Amethyst “Grape Agate” $360.00 Locality Batu Manakarra Mining District; Mamuju District; Sulawesi Barat Province, Indonesia Dimensions 144mm x 77mm x 55mm Mass of translucent purple microcrystalline spheres of quartz var. amethyst, averaging about 3 mm across. From the 2016-17 mining season.