I like Blue Nile for simple earrings as well. I have some gold hoops and love knots from them that I’ve had for several years now and they’re well made and priced very reasonably.
I have simple Jewelry from both Ross Simons and Blue Nile. I think the quality is pretty good but it depends on the piece of course. Both have good return policies though.
You might also want to just check out overstock. Quality is variable but they occasionally have good deals and good quality.
I would get white gold because the price differential is not that much and silver tarnishes fast on some of us. It can be a hassle. Just something to consider.