Large amethyst geode with agate/amethyst stalactites

A large amethyst geode with agate-amethyst stalactites from Santa Catarina, Brazil. The needle-shaped stalactite aggregates stand like small petrified growth columns in the violet geode.

Agate-amethyst stalactites document a two-phase genesis. First, an agate microcrystal core crystallized, then amethyst solutions deposited quartz tips on the outer surfaces of the stalactites. The result is aggregates with concentric mineralization stratigraphy.

The Santa Catarina deposit globally supplies the highest quality material for such multi-component stalactites. Geodes of this block size with pronounced stalactite details are a prime rarity based on their discovery, appearing only once every few years.

Each stalactite layer corresponds to a mineralization phase, each banding to a geochemical episode. A Brazilian museum-worthy collector's item with premium stalactite genesis and architectural gallery dimensions.