Silver ring domed style marked 925 - Onyx and Marcasite

925 Sterling Silver Cocktail ring Nice looking silver ring. Appears to be Onyx and marcasite. Measures 6 1/2 Ring marked on inside 925K Thai Very attractive---Selling at a discount Ring weighs 7.76 grams I am no expert when it comes to listing jewelry. I'm uncertain of the type of stones and their quality. But I can tell you what looks nice and describe the merchandise to the best of my ability. So I can tell you now " let buyer beware" and purchase with that information in mind. If I undersell something because I'm not totally aware of it's true value, that's my bad and you end up with a great deal. Just selling these inherited rings and other jewelry to help a friend settle an estate.