Bezel set gem.necklace help

[IncessantNameChanger]

Where can I get a Tiffany diamonds by the yard style necklace? Either in silver or some other non plated no tarnish metal like stainless steel? Ideally coloured gems? I don't want to risk Etsy as the seller's I have seen look scammy

qvc have lots of station necklaces. 60 days to try it out and money back if you return it, you just pay postage both ways.