A woman looking at fine jewelry on her laptop. Shopping for adornments from your couch is the ultimate modern luxury. You can browse thousands of sparkling options without leaving your pajamas. However, finding a reliable online jewelry store requires a bit of savvy. You want a piece that looks like a million bucks without the retail markup. As Marilyn Monroe famously sang, "Diamonds are a girl's best friend." Today, those friends often appear on a digital screen. Whether y