Agate / Crystal Geode

Smoky grey faces hide a ruby-red slot of tiny sparkling grains.

This is an agate and crystal geode. A geode is a hollow rock lined with mineral crystals, and it forms when mineral-bearing water slowly deposits material inside a cavity over a very long time. Cut pair of round halves in cloudy grey with rusty crusts clinging to the outer edge. Each has an irregular red-brown slot filled with fine, glittering grains. The right half is smaller and paler. It is 4.75 inches wide, 3.5 deep and 3.5 high.

A tiny red surprise in a very grey room.