Green agate on a 16" chain.
Agate is a banded form of finely-grained, microcrystalline Quartz. The lovely colour patterns and banding make this translucent gemstone very unique. Agates can have many distinctive styles and patterns, but each Agate is unique in its own habit, with no two Agates being the same.
Most agate has unimpressive colours and patterns. However, agate is a porous material that readily accepts dye. Most of the spectacularly coloured agates sold in the gemstone trade have been dyed.