Smoky Quartz twin crystal with clear tips and rock crystal in the lower third

A Smoky Quartz Twin Crystal from Brazil with clear terminations and a Rock Crystal zone in the lower third. Three quartz generations are stacked as optical stratigraphy.

Twin crystals form when two individual quartz crystals grow in parallel from a common nucleus. In their final form, they are visible as a connected pair. The constellation with two clean terminations is a rare variant.

The color zoning documents the radiation history. Rock crystal zone without discoloration in the lower third, darker smoky quartz area in the middle growth, clear terminations at the end.

Three mineralization phases can be read as optical stratigraphy. Such smoky quartz twins from Brazilian pegmatites are premium collector's items.

A Brazilian collector's item with twin architecture, three-zone stratigraphy, and premium clarity at the terminations.