A terp pearl, also known as a dab pearl or terp ball, is a small sphere-shaped accessory used in conjunction with a dab rig or a banger. It is typically made from heat-resistant materials such as quartz, ceramic, or ruby.
When dabbing, the terp pearl is placed inside the heated banger, which is a component of a dab rig used to vaporize cannabis concentrates. As the concentrate is heated, the terp pearl rotates and moves around inside the banger, helping to distribute the concentrate and enhance vaporization.