Banded Agate

It's so delightful to collect Banded Agates.  Each one is unique and like a little work of art.  And Banded Agate jewelry is also fun to collect.

Also called Banded Agate stone because an agate is not just one sole mineral, but a composite of minerals such as chalcedony or some other form of cryptocrystalline and micro-fine quartz particles.  It formed in layers, which are the bands, usually alternating between a layer of chalcedony and a layer of quartz.

These Banded Agates are from Madagascar.