Muscovite from an amethyst geode, very clear bizarre selenite crystal group from Brazil

A very clear, bizarre Muscovy Glass Selenite crystal group from an amethyst geode from Brazil, Rio Grande do Sul, Irai. The transparent selenite plates grew directly in the purple quartz matrix of the geode.

Muscovy Glass in an amethyst geode is a rare depositional constellation. Selenite (CaSO₄·2H₂O) and quartz amethyst typically crystallize in different geochemical environments.

Such multi-location pieces document a specific solution history. The bizarre crystal group shows an extraordinary growth geometry of the selenite plates in an amethyst cavity matrix.

The Irai deposit in Rio Grande do Sul provides the world's best Muscovy Glass material. What makes this piece special is the combination of premium clarity, bizarre geometry, and amethyst matrix.

A Brazilian collector's item with documented multi-location genesis and gemological premium classification.