Diamonds are forever, but when it comes to engagement ring trends, your mileage may vary. That's why I recently reached out to a diamond expert to help me rank 10 popular

engagement ring shapes from the most timeless to the least. While there's no right or wrong answer, it’s important to weigh your options when making such an expensive decision. A timeless engagement ring is a safe choice, but a trendier ring is can be a beautiful reminder of the era in which you became engaged.

When Victoria Beckham got engaged to David Beckham, she opted for a more trend-driven, marquise-cut diamond (and then later upgraded to a collection of over 10 engagement rings). Model Emily Ratajkowski also went for a more fashion-forward style of a pear-cut diamond situated next to a second square-cut on the same band. Actress Sarah Hyland, on the other hand, went for a massive and timeless oval option when she said yes last month.

Scroll ahead for a refresher on the basics of engagement rings. Then get the full ranking of diamond shapes from the most timeless to the least, according to Josh Marion, a diamond expert who has over 20 years of experience in the industry and is currently vice president of Ritani, a luxury online jeweler that specializes in handcrafted custom engagement rings.