quartz from Sulawesi, Indonesia
Brendan M. Laurs
Encinitas, CA 92024 USA
George R. Rossman
Division of Geological and Planetary Sciences
California Institute of Technoloty, Pasadena, CA 91125
new quartz gem was discovered near Mamuju, Sulewesi Island, Indonesia.
The material has commonly been sold as 'grape' chalcedony.
A specimen of Manakarra amethyst.
A polished slab through a single sphere of Manakarra amethyst.