Moqui Marbles
Commercial name for round sandstone concretions from the Navajo Sandstone Formation in the United States. Although most Moqui stones come primarily from Utah, where the…
Tag: concretion
Gogotte / Goddess Stone
Gogotte is a French name for an unusual sandstone concretion, a sedimentary rock composed almost entirely of quartz grains cemented together by silica. These Gogottes…
Fairy Stone
Commercial name for concretions of calcite (calcium carbonate) and clay, formed in glacial deposits around a core of, say, a pebble or crystal. A kind…
Fact or fable? – Septarian concretions originate from deceased animals
Septarian is a special stone that attracts attention with its unique appearance. Moreover, an interesting story circulates about the origin of septarian dating back to…
