Great amethyst geode pair with many calcite flowers and a blue chalcedony rim

An amethyst geode pair from Brazil with lilac-colored crystals and a blue-gray chalcedony rim. Both halves show an approximately identical shape and complement each other as a mirror-image pair.

Inside are several calcite flowers of various sizes. They formed in a later phase of geode growth, crystallizing from carbonate-rich residual solutions on the older amethyst points.

The rim combines gray and blue chalcedony with rock crystal. This sequence of layers documents the mineral phases of a gas bubble in basalt, approximately 100 million years old.

A pair with full geode symmetry, clearly visible calcite flowers, and a size that two bedside tables can jointly support.