Where can you buy solitaire diamond earring?

You can buy them at any jewelry store in your town or online, however diamonds are artificially priced. You can get cubic zirconia earrings that look exactly the same for 1/10th or even 1/100th of the price of diamonds.

If you still insist on diamonds, I would suggest buying them used on ebay, Amazon, or another online retailer that does not use a middleman. Don't buy from a department store or jewelry store if you want a good price.