Yes, I think one either loves eternity bands or not, but definitely try them out so you know for sure.
For me, I have tried to love the eternity band design worn as a right hand ring, and I can't. Because it's a "band ring", I feel like I'm wearing a wedding band. Perhaps one day I will change my mind as I think a ruby eternity ring is stunning.
On iconic sapphire jewelry...
This answer is complicated, but the short answer is there are very few iconic sapphire (or fine gemstone) pieces. Why?
First, to me, an "iconic" piece is one that everyone recognizes. In this sense, it also means the jewelry piece is mass produced, owned by many, and hence, it is "iconic" and to some extent, in the luxury circle, ubiquitous. VCA Alhambra and Cartier Love are the best examples. They are iconic because they are mass produced, and it is easily recognizable. I assume you want a piece that people will recognize.
That said, if you want an iconic style with a sapphire, your best bet is to do a SO. The stones will be tiny though, so it's not really a piece of sapphire jewelry. It's more a nice iconic jewelry design using sapphires, but that may be what you have in mind. Perlee Clover and Frivole would look beautiful and iconic. The downside is the sapphires will be really tiny and not one large sapphire.
If you don't want to do SO, a brand to look at is Tiffany. Tiffany makes iconic colored gemstone jewelry. Again though, the stones are very tiny, but that's all you can really get for iconic (e.g. mass produced) pieces in sapphire.
If you can live with something not so iconic and want a nice size fine quality sapphire, then there are a lot more options as I posted earlier. The pieces will not be iconic though. Why?
This is because fine large colored gemstone stones are a bit rare, and equally as important, because they are a bit rare, this means one cannot order up the exact same stone (same size, clarity, color) by the batch. Hence, a jewelry piece with a good size fine sapphire (or ruby, emerald) cannot be massed produced. Fine sapphire pieces will typically be one of a kind pieces.
Back to iconic pieces... There are not many options when it comes to iconic sapphire settings, and the stones will be small.
Assuming you want iconic and do not want to SO, some pieces to try:
Tiffany has their Soleste line. It's a very simple design. I think their pear shaped stone in a Soleste double halo looks nice. Soleste pieces in stock are typically small, but you can request to see larger pieces as they come in.
I recall you like dainty rings, so here is Soleste in a round stone as FYI. The sapphire is very small at .45cts, but the dainty look might be what you want. Soleste also comes in larger stone sizes, along with pendants and earrings.
www.tiffany.com
Here is my favorite Soleste design.. a pear shaped stone with a double halo:
www.tiffany.com
Another idea... For those in the know, the Schlumberger 16 stone ring is iconic.
www.tiffany.com
For gorgeous sapphire pieces, try going to Bergdorf's jewelry boutique on the first floor. They have tons of colored gemstone pieces (be sure to check out Bayco in the back), sapphires, emeralds, rubies.
Also, a must do is to go to Cartier on 5th and look at their colored gemstone pieces. I am not talking about sapphire Love bracelets on the first floor which is massed produced. I am talking about their colored gemstone pieces on the second floor.
Cartier's colored gemstones are stuff of legend. Their colored gemstone pieces are high jewelry and probably not what you want. Most pieces are in simple settings as the star is the gemstone. These are also one of a kind pieces. The point here is to look at the stones. Stare at them and look at their beauty. You will either fall in love with fine sapphires (and colored gemstones) and want a stunning sapphire, or you will find the setting not iconic enough and prefer to go with an iconic jewelry piece with smaller sapphires sprinkled.
Once you know what you want for your sapphire piece, you can now focus.
Be sure to go to Cartier and go to their fine colored gemstones floor (not first floor stuff). This is a must.
To fully appreciate something, one must first see the best that is offered. If after having seen fine sapphires and you still prefer an iconic setting, then you know your answer and can focus on iconic pieces only with the tradeoff being a smaller stone.
Yiikes! Sorry for the long post (I need to quit posting!)
I did want to share my thoughts with you to help in your decision. Good luck and happy browsing!
ETA: Here are good examples of what I mean by the tradeoff. This is a sapphire ring by VCA. The size is nice at 3.62cts. However, the setting is not iconic. The setting is simple as the focus is the sapphire. The sapphire is the star in this piece.
A smaller ring with a 2.71ct stone. Simple setting, not iconic, but again, the sapphire is the star.