Subunits within the vein system that have been logged in core include:
• Massive vein: consists of massive to sugary, very fine to fine-grained quartz. This
unit often cores the colloform- to crustiform-banded veins and contains fragments
of the sulphosalt-rich colloform-banded veins. Many veins were a late, low
temperature, carbonate-rich phase that was subsequently recrystallized by quartz.
Comb-textured amethyst is a relatively common component in the core of these
veins.