Both rings are silver metal, rhodium plated. REVIEW:
Asscher uternity is 6.8tcw/4mm or .40ct each stone, size 7. I really like this ring a ton. I like that the asschers have noticeable windmills and 3 steps facets. Comfortable to wear, low-set, well-made and uniform, has presence, but it's not bulky. Stones are probably closer to a D color, which is a tad too colorless for me, but I can live with that as it looks pretty realistic. It doesn't throw out a lot of fire/color, which is a good thing as it's not screaming out CZ. I'm going to keep it.
Round uternity is 5.6tcw/4.5mm or .33ct each stone, size 8. This one is going back. Also low-set and well-made, but I feel like there's no depth to these RBs. They seem flat, light leaky at the edges, and they are throwing off bright rainbow colors, way too much for my liking. I feel like these are flashing FAKE. The facets don't look sharp and crisp, like my Asha RBs and my Winfield's u-prong eternity. It may not show in the pics, but this is all apparent IRL. I like the .33ct stone size, but I'm not crazy about where the prongs are placed. It almost looks like the single-prong Memoire eternity band and I'm not fond of that style.
Asscher on left, RB round