Amethyst

SiO₂

A stone that keeps
its most beautiful
architecture inside.

Hollow, then inhabited.

A cavity becomes a place to grow. Silica-bearing water leaves quartz crystals pointing inward, each face following the mineral’s ordered structure.

The violet color is associated with iron impurities and natural irradiation. Pale tips and darker zones can coexist in the same crystal.

Mohs hardness
Quartz scratches glass;
hardness is not toughness.