How would you market these pendants online?

I would suggest social media marketing like pinterest and instagram. Let the images do the talking.

You for sure need a social media campaign. The product is pretty cool, images are good.

Try something like this so you can at least say that someone has your product on the social media space

{How to get your handmade products in the hands of celebrities.}

One other thing I thought of was to try to use sites like Reddit to promote. Here are some recent notes I took from a book I read on using social media:

g. Reddit
i. Works differently than other sites but easy to get a bunch of traffic from.
ii. Don't need to have a following.
iii. It is a social bookmarking site. Broken into categories called sub-reddits
iv. Most popular Sub-Reddits across the top.
v. Create an account at Reddit
vi. Comment on a couple of posts per day
vii. Wait several minutes between comments, and leave it for 48 hours.
viii. Find a sub reddit search for keyword.
ix. Make sure there are a lot of people subscribed, don't go to ones with too many followers.
x. Use a title as the description, look at titles do well.
xi. Each time someone comments it gets posted to their profile, and draw a bunch of traffic.
xii. Tip is to use a different account and IP address for each submission. I think more than likely if you share multiple things you will probably be alright. Just don't strictly promote one site. Maybe I will test this and update here.

PPC and then when someone buys put them on a separate list and then offer value and discounts on your new stuff.

We did this with feng shui products in oz, and I sold that biz in 2010 for a very nice sum. :-)

its sounds like you need a bigger database of customers, so use these tips to build a bigger list. Your niche is a good one I think so get more leads, and advertise in magazines and other major top playing sites in this niche, do a quick search on google, I even found some newsletters that I could see one of your ads do well.

Just my 0.02 cents.

What other benefits can a pendant have besides looking good and making you feel good? Sadly, they are simple metal with no magical properties. They're really meant to be symbols of great warrior cultures. I'd love to do modern military ones someday.

Other than the strategies you have applied you can also try out:
Daily Deals sites like Groupon and Living Social, as you can make a lots of sales within a short period of time.
Shopify or Big Cartel are a complete ecommerce and hosting stage that permits you to set up your own shop, offering whatever you like without needing to endeavor to manufacture your own site or to use heaps of cash finishing this.
Email : In spite of the fact that email is a similarly old innovation inside the web world, it can even now be an incredible approach to raise cognizance of new items to existing and new clients.