Yes, gemstone engagement rings have become increasingly popular in recent years, as more people are looking for unique and personalized alternatives to traditional diamond engagement rings.

Sapphires, in particular, have become a popular (if not the most popular) colorful gemstone alternative for engagement rings. Gemstone engagement rings can also be more affordable than traditional diamond engagement rings while still offering a stunning eye-catching look.

The type of gemstone you choose for your engagement ring is mainly going to depend on personal preference, but keep in mind that engagement rings are generally worn everyday so make sure to choose a gemstone that tends to be more durable (as well as eye-catching).

Popular choices for gemstone engagement rings include:

1. Sapphires
2. Rubies
3. Emeralds
4. Morganite

Gemstone engagement rings, like all jewelry, can vary in their resale value based on factors such as the type of gemstone, the quality of the stone, and the condition of the ring. In general, however, gemstone engagement rings may not hold their value as well as diamond engagement rings, which have traditionally been seen as a symbol of lasting value and durability.

That being said, some gemstones, such as sapphires and rubies, are known for their durability and are more likely to retain their value over time. Other factors that can influence the resale value of a gemstone engagement ring include the quality of the setting and craftsmanship, as well as the rarity and desirability of the specific gemstone.

If you are considering purchasing a gemstone engagement ring, it's important to choose a high-quality stone and setting that will last for many years and retain its beauty and value. It's also a good idea to have the ring appraised and insured to protect your investment.