French Vintage Blue Quartz Silver Ring

French Vintage Blue Quartz Silver Ring - Genuine not lab work! Size - 7 Adjustable There seems to be a stamped mark inside the band of the ring, but it has been worn off and no longer readable. Condition - Very old - mid century - vintage. Normal wear on the silver - no issues no problem noted.This ring came from France with our grandma - it has some wear & tear on the silver, but has not been used in past decades. The stones are bright, shiny and clear, not cloudy. Thank you.