This is the highest grade of Sacred Seven. Sacred Seven refers to a mixed crystal formed by three types of quartz (clear quartz, amethyst, smoky quartz) and four other minerals: cacoxenite, goethite, lepidocrocite, and rutile quartz. ■ Product Weight: Approximately 40.3g ■ Product Size: Inner circumference approximately 168mm (±5mm), bead diameter approximately 11mm (±0.5mm) to 12mm (±0.5mm)