Vintage stamped 925 sterling silver & smoky quartz/topaz abstract swirl ring

Vintage stamped 925 sterling silver & smoky quartz/topaz abstract swirl ring. Simple elegance with an abstract silver swirl capped by a faceted, smoky stone (either quartz or topaz). Inner band stamped 925. High quality piece, though no maker’s mark is apparent. Sits between size 7 and 7.25 on my ring sizer. Good condition. Light wear. Aging/oxidation to the silver. Please refer to photos for additional condition details. 3C