Emerald & Ruby Gold Ring

I am selling my beautiful, one of a kind, yellow gold ring with one emerald (approximate 1.15 carats) and six rubies, and two tiny diamonds.  This ring was handmade by my jeweler - I am the only person who's owned it.  It's about size 6. When I bought it, I was told it was 18k gold, but it's not stamped, so I had it appraised last month, and they tested it and said it is between 14k -18k. The ring is quite heavy (more than 7 grams). Price is US$990 (appraised value is CDN$4500 = approximately US$3400).