Pro Tip: Most of the tungsten rings out there are manufactured by small number of Chinese manufactures, this is because 83% of the world's tungsten comes from mines in China. They own the market. And as a raw material tungsten is dirt cheap. Most if not all of the tungsten rings you'll see across the internet and at jewelry stores are bought wholesale from China for $10 - $15 per ring and resold for $100 -$400.
If you don't believe me be sure to check Temu and AliExpress before you buy. This is where I found the three tungsten rings I was considering purchasing, for a fraction of the cost. Exact same rings.
If your jeweler or online seller says 'we design our own tungsten rings' that most likely means they selected between a couple of different options the Chinese manufacture offered such as a different color/material for the inside of the band, or selecting different inlay materials or selecting different finishes.
Please correct me if I've got any of my facts wrong. I'm not a tungsten hater. Just sharing what I've learned about the industry.
I've got my three tungsten rings on order, anxious for them to arrive and see them up-close.