Pair of amethyst geodes with unique shape and calcite crystals

A pair of amethyst geodes from Brazil with a harmonious "gnome cap" shape. Amethyst crystals of natural color grow inside, encased by a wide layer of polished rock crystal.

In the left half, several calcite crystals have also grown, making the pair a unique mineralogical specimen. Such combinations are rarely documented in Brazilian geodes.

Both halves come from a single cut-open gas bubble. The geode material originates from the classic deposits of Rio Grande do Sul, the highest quality amethyst material worldwide.

Three features characterize the pair: characteristic "gnome cap" shape, wide rock crystal rim, mineralogical peculiarity of the calcite inclusion.