https://gsm.min-pan.krakow.pl/Host-rock-characteristics-and-geochemistry-of-the-Rongkong-Opal-C-Mineraloid-North,175393,0,2.html
Host-rock characteristics and geochemistry of the Rongkong Opal-C Mineraloid, North Luwu Regency,...
Opal can be found in several locations, including America, Tanzania, Brazil, Mexico, East Africa, Indonesia and Australia, which is now the world’s top...
north luwu regencyhost rockof thecharacteristicsgeochemistry