Where is a good source for loose lab emeralds?

[chaitea]

I'm interested in recreating this ring with a lab emerald. https://jrcolombianemeralds.com/pro...h-green-emerald-marquise-3-stone-diamond-ring I'm open to it being an a rectangular shape too, not super attached.

Can anyone help with recs: is there a good source of lab emeralds that approximate this kind of glow? I'm really after the glow because that's the best part about emeralds, but a lot of lab emeralds look like green glass on my computer screen. I'd prefer someone with an online e-store presence and email communication rather than have to make a purchase via a social media platform.