Rock crystal twin crystal point with black tourmalines

A Brazil-sourced rock crystal twin point with embedded black tourmaline (schorl). The transparent quartz matrix offers a clear view of the dark rods, making the three-feature constellation easily discernible.

Twin crystals form when two individual quartz crystals grow in parallel from a common seed, appearing as a connected double in their final form. Schorl, as black tourmaline and a complex boron silicate, grew synchronously with the quartz.

Their co-deposition indicates a boron-containing pegmatitic deposit. Such multi-component rock crystals are considered premium gemmological pieces in the collector's market.

Brazilian rock crystal deposits supply this quality material. The clarity contrast between transparent quartz and deep black schorl is striking.

A Brazilian collector's piece with twin geometry, schorl inclusion, and clean point crystallography.