Agate / Crystal Geode

Grey-brown bands wind inward to a pale blue-white heart, with a dusty crust.

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. Pair of round cut faces with concentric bands of brown, grey and white. Each has a small rounded cluster in the center, tinted soft blue. The right half has a thick, crusty edge with a dark mark. It is 4 inches wide, 3.25 deep and 3 high.

Layer upon layer, patiently arranged by something unhurried.