Aura quartz is not a naturally occurring mineral. It is natural clear quartz (SiO₂) that has been permanently coated with metal vapors in a high-heat vacuum chamber. This process creates intense metallic rainbow colors on the surface of the quartz.
Rainbow Jasper is not a single locality-specific jasper, but rather a descriptive name for richly banded, multicolored jasper. It stands out for its earthy rainbow of stripes compared to the orbicular Ocean Jasper or the scenic Picture Jaspers.
Attractive red rhyolite is cut and polished into cabochons, spheres, and carvings. Some named varieties (like Leopard Skin Rhyolite or Rainforest Rhyolite) are popular with collectors.
