Chevron Amethyst Point

A Chevron Amethyst point from Brazil. The banding of this piece shows an unusual two-zone distribution: denser V-banding in the lower part, wider spacing in the upper part.

The varying banding densities document changing growth rates: dense banding occurs during periods of rapid solution change, while wide banding occurs during periods of slower chemical cycles. The two-zone distribution indicates two different geological episodes in the deposit's history.

Such zoned banding variants are of particular gemmological interest because they document geologically more complex mineralisation histories. They are rarer than uniformly banded pieces.

Brazilian Serra Geral deposits supply the material.

A Brazilian collector's piece with two-zone banding stratigraphy and documented geological complexity.