【Wollo, Ethio】Villagers Discover a Deposit of Pure Black Opal in Artisanal Tunnels
Editor’s NoteThis article details the discovery of a significant black opal deposit in the highlands of northern Ethiopia. It explores the geology of…
Mineral Deposit
【Julian, Cali】New Emerald Locality in Southern California
Editor’s NoteA new emerald deposit has been identified in California’s Julian Mining District, marking a notable geological discovery in a region not…