Sterling Silver 18” chain with dark blue pendant

I bought this necklace for far too much at a charity gala in Tucson AZ. I was told it is a blue sapphire and when I took it to my jeweler, they agreed that it was a “low quality” blue sapphire. The color is beautiful and semi opaque. Hoping to pass this along to someone who will wear it more than I have! 18” sterling silver chain