Agate / Crystal Geode

Soft grey-lilac rings step inward to a small, sparkling pocket.

This is an agate and crystal geode. Agate is a banded variety of chalcedony, a microcrystalline form of quartz, and its layers often appear in bands of white, gray, blue or brown. Set of two oval halves with fine concentric bands in pale mauve and white. Each has a granular center, with the larger half showing a wider ring of white fibers. The edges are thin, dark and smooth. It is 5.5 inches wide, 4.5 deep and 3.5 high.

A gentle gradient, nicely measured and calmly kept.