376 specimens in our catalog
Quartz
Amethyst
Agate
Travertine
Marl Concretions (Marlekor)
Magnesite
Chalcedony
Rose Quartz
Petrified Wood (Juglans species)
Petrified Juniper Wood
Hematite
Ilmenite and Hematite
Calcite
Herschelite (Chabazite-Na)
Lussatite (Chalcedony pseudomorph)
