Vintage 14K gold and diamond ring

Vintage 14K yellow and white gold ring with 18 diamonds. My grandmother purchased this ring from a telethon in 1988 and gave it to me in 1993.
If you can read the paper that came with it, it describes this ring done by a jeweler. Back in 1988 the ring was valued at $700. I figured with inflation and the rise in price of gold and diamonds, this ring should bring about $1500 today. So that's what I'm asking for it.
Located in Killam Alberta.