Amethyst Geode Pair

An amethyst geode pair from Brazil with rock crystal and agate rim. The two halves show amethyst crystal-covered rims all around in the lower part of the geodes.

Geode pairs are formed when a single geode is cut in half. The two halves are thus geometrically complementary and show identical mineralization generations in a mirror arrangement.

The rim structure documents the genesis sequence: volcanic rock on the outside, then agate banding, then rock crystal rim, with amethyst points in the center. A textbook stratigraphy of a Brazilian geode.

Mirror shape, identical height grading, and uniformly colored crystal growth make the pair a cohesive display unit.