Geodes and in particular amethyst geodes are fascinating members of the quartz-crystal family. Tall purple/violet geodes are usually called amethyst cathedrals.
Geodes of every type and price range. Cathedral amethyst geodes, amethyst geodes with calcite, agate and crystal geodes, ocho geodes, and break-your-own geodes. Geodes from $1.50 ...
Most geodes contain clear quartz crystals, while others have purple amethyst crystals. Still others can have agate, chalcedony, or jasper banding or crystals such as calcite, ...