Explore Grotto Zurrieq, Zurrieq Malta, and more!

Explore related topics

moqui marbles, utah Iron oxide concretions (Moqui marbles) Moqui Marbles, hematite concretions, from the Navajo Sandstone of southeast Utah. Scale cube, with "W", is one centimeter square. The Navajo Sandstone is also well known among rockhounds for its hundreds of thousands of iron oxide concretions #science #geology

Pinterest • The world’s catalog of ideas