Need website help...or not

You know what? Don't be picky abou the code. Just pick the cleanest bootstrap you can find (limit yourself to an hour of time for finding one) and use it as-is. I understand not wanting it to be bloated or have extra stuff but you're really probably not saving that much load time by taking stuff out. Focus on getting your site up and running instead of making the code perfect or it'll never get done.

Is there a reason you are not using services such as Shopify where you can create a mobile-ready online store in a couple hours? (I am using Shopify as an example but there are at least a dozen excellent options that I'd be happy to share). I understand that you are stuck on the responsive aspect right now, but once you've figured that out, there will be the payment aspect (with potential PCI compliance issues, and for sure the big piece of integrating with a payment processor, unless you are willing to lose up to a quarter of your buyers with offsite checkout), then the user management aspect, then the email aspect, then the database backups aspect, and so on, ad infinitum. I am a software engineer with over 15 years of experience building websites and I would not tackle a custom website for a jewelry business, personally, unless it did $20k or more per month in volume. For this type of a business, it makes a lot more sense to invest your time and money into gorgeous product photos, and let a proven online shopping platform handle your e-commerce.

If you need a one-pager with a store, maybe you need to toss your back-end items on something like Shopify and then choose a front-end template http://html5up.net/? I was in this same boat (minus the store) and was able to put together a responsive website that linked to a bunch of other things elsewhere but looked completely nice in a few hours and was mostly easy to customize and didn't need a bunch of taking apart.

Do you want a working website, or do you want to build a website? It sounds like you want the former, but you're doing the latter.

Why not just use a Squarespace template? They're beautifully responsive, and also allow you to tinker with code if you feel up to it, or just leave things on default if you don't. Selling functionality is built in. If you're not well, just make things easy for yourself.

I've been playing a lot with Adobe Muse lately. It's not totally responsive but it does allow for tablet and mobile alternate versions. It's all GUI, like Illustrator or InDesign. If you must re-make it from scratch, it's not a bad way to go from a design perspective. If you need an e-commerce shop you'd have to sign up with Business Catalyst. It's not the cheapest, but it has every module you could ever need just about. The alternative is of course, like you said, bootstrap theme, probably built on wordpress. I'm not a coder (yet) but I'm working with a few partners in starting a web design business. I'm more from the design front, but if you like, I could ask my partners if they might be interested in setting you up with a rebuild of your site in the responsive spectrum. If they are not interested, I could do something myself by designing your pages in Muse (excluding your e-commerce). But I take it that might not be much help?

Could you maybe expand on why you don't want to use a framework? I mean, I get that you feel like it will be more efficient in the long run (I don't necessarily agree), but in the meantime you've been waiting months and months to get this done, and there's no reason to think it will not take more and more months. You could have a responsive website right now with a framework. tl;dr: Don't let the perfect be the enemy of the good.

From my experience, building from scratch is actually way more work and upkeep than using a framework. If something changes in web standards or the way browsers render things, when I use a framework I usually just have to apply someone else's patch. When it's my own work, it only gets updated if I do the updating. However, if you're really set on building something yourself, there are less opinionated frameworks than Foundation and Bootstrap. One that I like is http://bourbon.io/ + http://neat.bourbon.io/. You get a lot of the benefits of a framework (testing, edge cases covered, a community), but none of the excess implementation that Bootstrap has. It is, of course, more work to get a design built as a result. I also echo previous commenters in recommending Shopify or Squarespace as very decent turn-key solutions.

I use Bourbon and Neat all the time and it's generally painless to port an existing site to it, after which adding the media queries for responsiveness are very straightforward.