Agate, malachite, bismuth, selenite and fluorite: stone that grew one layer at a time..
GeodeViolet crystal interior
Hopper growthBismuth building in terraces
Banded agateAmber bands around a dendritic pocket
Growth ringsMalachite, ring inside ring
LabradorescenceLight inside the stone
BladesSelenite in a cave
CubesFluorite growing in squares
SliceA polished agate window
FractureObsidian broken like glass