Measures approx. 1" X 3/4" at its widest, and is not marked, but has been tested to be STERLIING SILVER!. Please NOTE; The turquoise has a crack in it. In very early Native American rings, these stones were chosen because it was beleived that their spirit has escaped thru the crack! Thanks and please check out all photos and ask any and all questions prior to looking. Thanks!! Launched from my store - Powered by Highwire.com Track Page Views With Auctiva's FREE CounterEvery buyer gets a MyStoreRewards invitation for cash back