you have 
This is a beauty . This is multi color stones and marcasites set into a Sterling setting . This is about a size 7 . The top spans 5/8 " .
This is signed insize .925 on one side . The otherside is hard ti make out . it is a very small spot . Under the Microscope ot Could be JA .
The weight is about 7 grams . Beautiful ring Excellent Condition .