Logs are not your only option for a gas fireplace. While the logs are fairly common to give the appearance of a “real” wood burning fireplace, crystals and stone can also be used for a different aesthetic.
There are many different varieties of crystals and stone available for purchase. Crystals are the more common purchase since they will tend to sparkle like jewelry due to flat edges that can reflect the light from the flame. This reflection is not just an aesthetic quality. When the crystals get hot, they reflect the heat back into the room. This will cause the room to warm faster which in turn will help with your energy bill.
Stone is an entirely different look. They are frequently referred to as “fireballs”. The stones in gas fireplaces can be used to create a modern feel.
Below you will find a variety of fireplace pictures: