Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

BOISE, Idaho — Join the Idaho Museum of Mining and Geology this Sunday, June 23 for a geode cracking event, announced a press release. As described in the news release, a geode is "a rock with a ...

Grab a bucket, some old shoes, and a little curiosity, because Illinois is quietly packed with places where crystals, geodes, ...

Göttingen University researcher Fiorella Arduin Rode working in open pit mine of the study area, Los Catalanes mining district, northern Uruguay. Along with Ametista do Sul in southern Brazil, these ...