Online shopping has become such a deeply ingrained part of daily life that many of us don’t stop to appreciate the newness of online shopping. In 1979, online shopping was invented by Michael Aldrich.

You can buy just about anything online. Even some purchases that seem best suited for an in-store experience have crossed over into the cyberworld. That includes a girl’s best friend—diamonds.

Everything can be done online nowadays. You can pay your taxes, stalk your friends, and even buy the most important thing you’ll ever buy in your life: an engagement ring. One thing about engagement ...