Calcite on Fluorite with Siderite

These came out about a year ago and were first thought to be spherical fluorites. Instead, the yellow spheres are calcite and they rest on a crystalized fluorite bed which are surficially coated by micro quartz. Brown to tan siderites later formed and are mostly concentrated around the largest calcite sphere. Unusual and attractive!

Locality: Wuyi, Jinhua, Zhejiang China

Composition: calcium carbonate and calcium fluoride