Super 7 Sterling Silver Ring. Size 6.
The gemstone is 8mm by 10mm. Small, barely noticeable fracture by the by the bottom left prong.
Super 7 is also called "Melody Stone" and is made up from 7 different minerals. Amethyst, Clear Quartz, Smokey Quartz, Cacoxenite, Rutile, Goethite and Lepidocrosite.