Agate / Crystal Geode

Pale lilac stars with ragged points sit inside buttery yellow shells.

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. Duo of round halves with thick, pale yellow rinds and a star-like, jagged cavity edged in mauve. The hollow is filled with soft grey, bumpy lumps. A few small pits dot the edge of the left half. It is 2.75 inches wide, 2.5 deep and 1.75 high.

Frilly in the middle, creamy at the edges.